

                           SECURITIES AND EXCHANGE COMMISSION
                                 Washington, D.C.  20549


                                        FORM 8-K


                     Current Report Pursuant To Section 13 or 15(d) of
                            the Securities Exchange Act of 1934

           Date of Report (Date of earliest event reported):  April 26, 2004


                         Greenwich Capital Acceptance, Inc.,
                 (as depositor, and Deutsche Bank National Trust
                              Company, as Trustee).

                WASHINGTON MUTUAL MORT PS THR CERTS SER 2003-R1
             (Exact name of Registrant as specified in its Charter)


                                       DELAWARE
                     (State or Other Jurisdiction of Incorporation)

               333-108195-05                          06-1199884
          (Commission File Number)        (I.R.S. Employer Identification No.)


               600 Steamboat Road
               Greenwich, Connecticut                    06830
          (Address of principal executive offices)     (Zip Code)


          Registrant's Telephone Number, Including Area Code:  (203) 662-2700


     Item 5.  Other Events

     Attached hereto is a copy of the Underlying Distribution Statement to the
     Certificateholders which was derived from the monthly information
     submitted by the Master Servicer of the Underlying Security to the Trustee.


     Item 7.  Financial Statement and Exhibits

     Exhibits:  (as noted in Item 5 above)

     Monthly Remittance Statement to the Certificateholders dated as of
     April 26, 2004.




                                     SIGNATURE


               Pursuant to the requirements of the Securities Exchange Act of
          1934, the Registrant has duly caused this report to be signed on its
          behalf by the undersigned, hereunto duly authorized.


                                  Deutsche Bank National Trust Company,
                                  not in its individual capacity, but solely
                                  as a duly authorized agent of the Registrant
                                  pursuant to the Trust Agreement,
                                  dated as of October 1,2003.


          Date:  Apr 26, 2004               By:  /s/  Katherine M. Wannenmacher
                                            Katherine M. Wannenmacher
                                            Vice President



                                   EXHIBIT INDEX

          DOCUMENT

          Monthly Remittance Statement to the Certificateholders
          dated as of April 26, 2004.


	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates


	April 26, 2004 Distribution


	Contents



			TABLE OF CONTENTS

								Page

			1.	Contents				1
			2.	Certificate Payment Report				2
			3.	Collection Account Report				8
			4.	Credit Enhancement Report				11
			5.	Collateral Report				12
			6.	Delinquency Report				15
			7.	REO Report				16
			8.	Prepayment Report				17
			9.	Realized Loss Report				20
			10.	Realized Loss Detail Report				23
			11.	Additional Certificate Report				24






				Total Number of Pages				24



			CONTACTS

				Administrator: Alan Sueda
				Direct Phone Number: (714)247-6315
				Address: Deutsche Bank
				1761 E. St. Andrew Place, Santa Ana, CA 92705

				Web Site: https://www.corporatetrust.db.com/invr
				Factor Information: (800) 735-7777
				Main Phone Number: (714) 247-6000



ISSUANCE INFORMATION

	Seller:		Washington Mutual Bank					Cut-Off Date: March 1, 2000
	Certificate Insurer(s):							Closing Date: March 31, 2000
								First Payment Date: April 25, 2000
	Servicer(s):		Washington Mutual Master Servicer


								Distribution Date: April 26, 2004
	Underwriter(s):		Lehman Brothers Underwriter					Record Date: April 23, 2004
								March 31, 2004






						Page 1 of 24					© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Lower Tier REMIC Series 2000-1
	Certificate Payment Report for April 26, 2004 Distribution


	Distribution in Dollars - Current Period
					Prior						Current
	Class	Original			Principal			Total	Realized	Deferred	Principal
Class	Type	Face Value			Balance	Interest	Principal	Distribution	Losses	Interest	Balance
					(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)

LT-A1		4,799,976,000.00			-	-	-	-	-	-	-
LT-A2		1,599,992,000.00			1,247,753,150.99	4,295,844.83	35,751,627.00	40,047,471.83	-	-	1,212,001,523.99
LT-M1		100,523,000.00			41,134,719.26	141,621.26	1,178,625.07	1,320,246.33	-	-	39,956,094.20
LT-M2		83,769,000.00			34,278,932.72	118,017.72	982,187.56	1,100,205.28	-	-	33,296,745.16
LT-M3		33,508,000.00			13,711,573.09	47,207.09	392,875.02	440,082.11	-	-	13,318,698.07
LT-B1		40,209,000.00			14,174,063.38	48,799.38	982,187.56	1,030,986.94	-	-	13,191,875.82
LT-B2		23,455,000.00			142,848.74	491.81	-	491.81	-	-	142,848.74
LT-B3		20,104,869.34			19,962,020.60	68,726.53	-	68,726.53	-	-	19,962,020.60
LT-R		-			-	-	-	-	-	-	-


Total		6,701,536,869.34			1,371,157,308.78	4,720,708.62	39,287,502.20	44,008,210.82	-	-	1,331,869,806.58


	Interest Accrual Detail				Current Period Factor Information per $1,000 of Original Face
						Orig. Principal	Prior				Current
	Period	Period				(with Notional)	Principal			Total	Principal
Class	Starting	Ending		Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
							(1)	(2)	(3)	(4)=(2)+(3)	(5)

LT-A1				F-30/360		4,799,976,000.00	-	-	-	-	-
LT-A2				F-30/360		1,599,992,000.00	779.849619	2.684916	22.344879	25.029795	757.504740
LT-M1				F-30/360		100,523,000.00	409.207040	1.408844	11.724929	13.133774	397.482111
LT-M2				F-30/360		83,769,000.00	409.207854	1.408847	11.724953	13.133800	397.482901
LT-M3				F-30/360		33,508,000.00	409.202969	1.408830	11.724813	13.133643	397.478156
LT-B1				F-30/360		40,209,000.00	352.509721	1.213643	24.427057	25.640701	328.082664
LT-B2				F-30/360		23,455,000.00	6.090332	0.020968	-	0.020968	6.090332
LT-B3				F-30/360		20,104,869.34	992.894819	3.418402	-	3.418402	992.894819
LT-R				F-30/360		-	-	-	-	-	-


							Page 2 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Lower Tier REMIC Series 2000-1
	Certificate Payment Report for April 26, 2004 Distribution


	Distribution in Dollars - to Date
											Current
	Original				Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal
Class	Face Value		Interest		Principal	Principal	Principal	Distribution	Losses	Interest	Balance
	(1)		(2)		(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)

LT-A1	4,799,976,000.00		535,861,077.70		4,620,338,847.23	179,637,152.77	4,799,976,000.00	5,335,837,077.70	-	-	-
LT-A2	1,599,992,000.00		358,543,113.23		-	408,146,809.49	408,146,809.49	766,689,922.72	-	20,156,333.48	1,212,001,523.99
LT-M1	100,523,000.00		21,922,048.96		-	60,566,905.80	60,566,905.80	82,488,954.76	-	-	39,956,094.20
LT-M2	83,769,000.00		18,168,024.51		-	50,472,254.84	50,472,254.84	68,640,279.35	-	-	33,296,745.16
LT-M3	33,508,000.00		7,267,287.77		-	20,189,301.93	20,189,301.93	27,456,589.70	-	-	13,318,698.07
LT-B1	40,209,000.00		8,698,212.72		-	27,017,124.18	27,017,124.18	35,715,336.90	-	-	13,191,875.82
LT-B2	23,455,000.00		4,685,458.74		-	23,312,151.26	23,312,151.26	27,997,610.00	-	-	142,848.74
LT-B3	20,104,869.34		4,783,329.86		-	-	-	4,783,329.86	142,848.74	-	19,962,020.60
LT-R	-		-		-	-	-	-	-	-	-


Total	6,701,536,869.34		959,928,553.49		4,620,338,847.23	769,341,700.27	5,389,680,547.50	6,349,609,100.99	142,848.74	20,156,333.48	1,331,869,806.58


	Interest Detail
	Pass-	Prior Principal				Non-	Prior	Unscheduled		Paid or	Current
	Through	(with Notional)			Accrued	Supported	Unpaid	Interest	Optimal	Deferred	Unpaid
Class	Rate	Balance			Interest	Interest SF	Interest	Adjustments	Interest	Interest	Interest
					(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)

LT-A1	4.13144%	-			-	-	-	-	-	-	-
LT-A2	4.13144%	1,247,753,150.99			4,295,844.83	-	-	-	4,295,844.83	4,295,844.83	-
LT-M1	4.13144%	41,134,719.26			141,621.26	-	-	-	141,621.26	141,621.26	-
LT-M2	4.13144%	34,278,932.72			118,017.72	-	-	-	118,017.72	118,017.72	-
LT-M3	4.13144%	13,711,573.09			47,207.09	-	-	-	47,207.09	47,207.09	-
LT-B1	4.13144%	14,174,063.38			48,799.38	-	-	-	48,799.38	48,799.38	-
LT-B2	4.13144%	142,848.74			491.81	-	-	-	491.81	491.81	-
LT-B3	4.13144%	19,962,020.60			68,726.53	-	-	-	68,726.53	68,726.53	-
LT-R		-			-	-	-	-	-	-	-


Total		1,371,157,308.78			4,720,708.62	-	-	-	4,720,708.62	4,720,708.62	-


							Page 3 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Upper Tier REMIC Series 2000-1
	Certificate Payment Report for April 26, 2004 Distribution


	Distribution in Dollars - Current Period
					Prior						Current
	Class	Original			Principal			Total	Realized	Deferred	Principal
Class	Type	Face Value			Balance	Interest	Principal	Distribution	Losses	Interest	Balance
					(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)

A1	STEP, FLT	4,799,976,000.00			-	-	-	-	-	-	-
A2	CSTR	1,599,992,000.00			1,247,753,150.99	4,440,014.73	35,751,627.00	40,191,641.73	-	-	1,212,001,523.99
M1	MEZ, STEP	100,523,000.00			41,134,719.26	54,480.65	1,178,625.07	1,233,105.72	-	-	39,956,094.20
M2	MEZ, STEP	83,769,000.00			34,278,932.72	57,588.61	982,187.56	1,039,776.17	-	-	33,296,745.16
M3	MEZ, STEP	33,508,000.00			13,711,573.09	34,614.10	392,875.02	427,489.12	-	-	13,318,698.07
B1	SUB, STEP	40,209,000.00			14,174,063.38	64,129.76	982,187.56	1,046,317.32	-	-	13,191,875.82
B2	SUB, STEP	23,455,000.00			142,848.74	1,154.22	-	1,154.22	-	-	142,848.74
B3	SUB, CSTR	20,104,869.34			19,962,020.60	68,726.52	-	68,726.52	-	-	19,962,020.60
UT-R	R	-			-	-	-	-	-	-	-


Total		6,701,536,869.34			1,371,157,308.78	4,720,708.59	39,287,502.20	44,008,210.79	-	-	1,331,869,806.58


	Interest Accrual Detail				Current Period Factor Information per $1,000 of Original Face
						Orig. Principal	Prior				Current
	Period	Period				(with Notional)	Principal			Total	Principal
Class	Starting	Ending		Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
							(1)	(2)	(3)	(4)=(2)+(3)	(5)

A1	03/25/04	04/25/04		A-Act/360	863572L68	4,799,976,000.00	-	-	-	-	-
A2				F-30/360	863572L76	1,599,992,000.00	779.849619	2.775023	22.344879	25.119902	757.504740
M1	03/25/04	04/25/04		A-Act/360	863572L84	100,523,000.00	409.207040	0.541972	11.724929	12.266901	397.482111
M2	03/25/04	04/25/04		A-Act/360	863572L92	83,769,000.00	409.207854	0.687469	11.724953	12.412422	397.482901
M3	03/25/04	04/25/04		A-Act/360	863572M26	33,508,000.00	409.202969	1.033010	11.724813	12.757823	397.478156
B1	03/25/04	04/25/04		A-Act/360	863572M34	40,209,000.00	352.509721	1.594911	24.427057	26.021968	328.082664
B2	03/25/04	04/25/04		A-Act/360	863572M42	23,455,000.00	6.090332	0.049210	-	0.049210	6.090332
B3				F-30/360	863572M59	20,104,869.34	992.894819	3.418402	-	3.418402	992.894819
UT-R				F-30/360	863572M67	-	-	-	-	-	-


							Page 4 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Upper Tier REMIC Series 2000-1
	Certificate Payment Report for April 26, 2004 Distribution


	Distribution in Dollars - to Date
											Current
	Original				Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal
Class	Face Value		Interest		Principal	Principal	Principal	Distribution	Losses	Interest	Balance
	(1)		(2)		(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)

A1	4,799,976,000.00		386,931,317.18		4,620,338,847.23	179,637,152.77	4,799,976,000.00	5,186,907,317.18	-	-	-
A2	1,599,992,000.00		517,482,481.30		376,080,741.61	32,066,067.88	408,146,809.49	925,629,290.79	-	20,156,333.48	1,212,001,523.99
M1	100,523,000.00		13,315,610.56		56,667,084.76	3,899,821.04	60,566,905.80	73,882,516.36	-	-	39,956,094.20
M2	83,769,000.00		12,259,481.13		46,822,666.71	3,649,588.13	50,472,254.84	62,731,735.97	-	-	33,296,745.16
M3	33,508,000.00		6,047,072.65		18,729,437.30	1,459,864.64	20,189,301.93	26,236,374.58	-	-	13,318,698.07
B1	40,209,000.00		10,477,484.36		24,988,464.20	2,028,659.97	27,017,124.18	37,494,608.54	-	-	13,191,875.82
B2	23,455,000.00		8,631,776.45		21,701,370.05	1,610,781.21	23,312,151.26	31,943,927.71	-	-	142,848.74
B3	20,104,869.34		4,783,329.83		-	-	-	4,783,329.83	142,848.74	-	19,962,020.60
UT-R	-		-		-	-	-	-	-	-	-


Total	6,701,536,869.34		959,928,553.46		5,165,328,611.86	224,351,935.64	5,389,680,547.50	6,349,609,100.96	142,848.74	20,156,333.48	1,331,869,806.58


	Interest Detail
	Pass-	Prior Principal				Non-	Prior	Unscheduled		Paid or	Current
	Through	(with Notional)			Accrued	Supported	Unpaid	Interest	Optimal	Deferred	Unpaid
Class	Rate	Balance			Interest	Interest SF	Interest	Adjustments	Interest	Interest	Interest
					(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)

A1	1.38000%	-			-	-	-	-	-	-	-
A2	4.27009%	1,247,753,150.99			4,440,014.73	-	-	-	4,440,014.73	4,440,014.73	-
M1	1.49000%	41,134,719.26			54,480.65	-	-	-	54,480.65	54,480.65	-
M2	1.89000%	34,278,932.72			57,588.61	-	-	-	57,588.61	57,588.61	-
M3	2.84000%	13,711,573.09			34,614.10	-	-	-	34,614.10	34,614.10	-
B1	5.09000%	14,174,063.38			64,129.76	-	-	-	64,129.76	64,129.76	-
B2	9.09000%	142,848.74			1,154.22	-	-	-	1,154.22	1,154.22	-
B3	4.13144%	19,962,020.60			68,726.53	-	-	-	68,726.53	68,726.52	-
UT-R		-			-	-	-	-	-	-	-


Total		1,371,157,308.78			4,720,708.60	-	-	-	4,720,708.60	4,720,708.59	-


							Page 5 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	A2-2 Components Series 2000-1
	Certificate Payment Report for April 26, 2004 Distribution


	Distribution in Dollars - Current Period
					Prior						Current
	Class	Original			Principal			Total	Realized	Deferred	Principal
Class	Type	Face Value			Balance	Interest	Principal	Distribution	Losses	Interest	Balance
					(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)

A1X		-			-	-	-	-	-	-	-
A2X		-			-	4,295,844.83	-	4,295,844.83	-	-	-
M1X		-			-	87,140.61	-	87,140.61	-	-	-
M2X		-			-	60,429.11	-	60,429.11	-	-	-
M3X		-			-	12,592.98	-	12,592.98	-	-	-
B1X		-			-	-	-	-	-	-	-
B2X		-			-	-	-	-	-	-	-


Total		-			-	4,456,007.53	-	4,456,007.53	-	-	-


	Interest Accrual Detail				Current Period Factor Information per $1,000 of Original Face
						Orig. Principal	Prior				Current
	Period	Period				(with Notional)	Principal			Total	Principal
Class	Starting	Ending		Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
							(1)	(2)	(3)	(4)=(2)+(3)	(5)

A1X				A-30/360		4,799,976,000.00	-	-	-	-	-
A2X				A-30/360		1,599,992,000.00	779.849619	2.684916	-	2.684916	757.504740
M1X				A-30/360		100,523,000.00	409.207040	0.866872	-	0.866872	397.482111
M2X				A-30/360		83,769,000.00	409.207854	0.721378	-	0.721378	397.482901
M3X				A-30/360		33,508,000.00	409.202969	0.375820	-	0.375820	397.478156
B1X				A-30/360		40,209,000.00	352.509721	-	-	-	328.082664
B2X				A-30/360		23,455,000.00	6.090332	-	-	-	6.090332


							Page 6 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	A2-2 Components Series 2000-1
	Certificate Payment Report for April 26, 2004 Distribution


	Distribution in Dollars - to Date
											Current
	Original				Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal
Class	Face Value		Interest		Principal	Principal	Principal	Distribution	Losses	Interest	Balance
	(1)		(2)		(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)

A1X	-		149,714,942.52		-	-	-	149,714,942.52	-	-	-
A2X	-		358,543,113.26		-	-	-	358,543,113.26	-	-	-
M1X	-		8,639,522.60		-	-	-	8,639,522.60	-	-	-
M2X	-		6,036,260.43		-	-	-	6,036,260.43	-	-	-
M3X	-		1,488,337.16		-	-	-	1,488,337.16	-	-	-
B1X	-		92,561.42		-	-	-	92,561.42	-	-	-
B2X	-		18,068.86		-	-	-	18,068.86	-	-	-


Total	-		524,532,806.25		-	-	-	524,532,806.25	-	-	-


	Interest Detail
	Pass-	Prior Principal				Non-	Prior	Unscheduled		Paid or	Current
	Through	(with Notional)			Accrued	Supported	Unpaid	Interest	Optimal	Deferred	Unpaid
Class	Rate	Balance			Interest	Interest SF	Interest	Adjustments	Interest	Interest	Interest
					(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)

A1X	2.65944%	-			-	-	-	-	-	-	-
A2X	4.13144%	1,247,753,150.99			4,295,844.83	-	-	-	4,295,844.83	4,295,844.83	-
M1X	2.54210%	41,134,719.26			87,140.61	-	-	-	87,140.61	87,140.61	-
M2X	2.11544%	34,278,932.72			60,429.11	-	-	-	60,429.11	60,429.11	-
M3X	1.10210%	13,711,573.09			12,592.98	-	-	-	12,592.98	12,592.98	-
B1X		14,174,063.38			-	-	-	-	-	-	-
B2X		142,848.74			-	-	-	-	-	-	-


Total		1,351,195,288.18			4,456,007.53	-	-	-	4,456,007.53	4,456,007.53	-


							Page 7 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Collection Account Report for April 26, 2004 Distribution


	Collection Account Report


SUMMARY								TOTAL

	Principal Collections							39,287,502.20
	Principal Withdrawals							0.00

	TOTAL PRINCIPAL							39,287,502.20

	Interest Collections							5,042,277.77
	Interest Withdrawals							0.00
	Interest Other Accounts							0.00
	Interest Fees							(321,569.18)
	TOTAL INTEREST							4,720,708.59

	TOTAL AVAILABLE FUNDS							44,008,210.79


PRINCIPAL - COLLECTIONS								TOTAL

	Scheduled Principal							3,907,387.35
	Curtailments							1,789,542.06
	Prepayments in Full							33,590,572.79
	Repurchases/Substitutions							0.00
	Liquidations							0.00
	Insurance Principal							0.00
	Other Additional Principal							0.00
	Delinquent Principal							(964,595.84)
	Principal Advanced							964,595.84
	Total Realized Loss Of Principal							0.00

	TOTAL PRINCIPAL COLLECTED							39,287,502.20


				Page 8 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Collection Account Report for April 26, 2004 Distribution


	Collection Account Report


PRINCIPAL - WITHDRAWALS								TOTAL
SPACE INTENTIONALLY LEFT BLANK


PRINCIPAL - OTHER ACCOUNTS								TOTAL
SPACE INTENTIONALLY LEFT BLANK


INTEREST - COLLECTIONS								TOTAL

	Scheduled Interest							5,150,337.89
	Repurchases/Substitutions							0.00
	Liquidations							0.00
	Insurance Interest							0.00
	Other Additional Interest							0.00
	Prepayment Interest Shortfalls							0.00
	Delinquent Interest							(1,298,058.39)
	Compensating Interest							0.00
	Relief Act Shortfall Amounts							0.00
	Interest Advanced							1,189,998.27
	Deferred Interest							0.00


	TOTAL INTEREST							5,042,277.77


				Page 9 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Collection Account Report for April 26, 2004 Distribution


	Collection Account Report


INTEREST - WITHDRAWALS								TOTAL
SPACE INTENTIONALLY LEFT BLANK


INTEREST - OTHER ACCOUNTS								TOTAL
SPACE INTENTIONALLY LEFT BLANK


INTEREST - FEES								TOTAL

	Curent Servicing Fees							320,426.55
	Trustee Fee							1,142.63



	TOTAL INTEREST FEES							321,569.18


				Page 10 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Credit Enhancement Report for April 26, 2004 Distribution


	Credit Enhancement Report


ACCOUNTS								TOTAL

	Beginning Reserve Fund Balance							5,000.00
	Curr Period Required Reserve Fund Deposit							15,992.79
	Curr Distributions from Reserve Fund							(15,992.79)
	Reserve Fund Balance							5,000.00


INSURANCE								TOTAL
SPACE INTENTIONALLY LEFT BLANK


STRUCTURAL FEATURES								TOTAL
SPACE INTENTIONALLY LEFT BLANK


				Page 11 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Collateral Report for April 26, 2004 Distribution


	Collateral Report


COLLATERAL								TOTAL
	Loan Count:
	*Original*							17816
	Prior							4,354
	Prefunding							-
	Scheduled Paid Offs							-
	Full Voluntary Prepayments							(106)
	Repurchases							-
	Liquidations							-
	Current							4,248

	*Principal Balance:*
	Original							6,701,536,869.34
	Prior							1,371,157,308.78
	Prefunding							-
	Scheduled Principal							(3,907,387.35)
	Partial and Full Voluntary Prepayments							(35,380,114.85)
	Repurchases							-
	Liquidations							-
	Current							1,331,869,806.58

PREFUNDING								TOTAL
SPACE INTENTIONALLY LEFT BLANK




Current Prin Balance by Groups (in millions of dollars)					Total Current Principal Balance (in millions of dollars)


				Page 12 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Collateral Report for April 26, 2004 Distribution


	Collateral Report


CHARACTERISTICS								TOTAL

	Weighted Average Coupon Original							7.423436%
	Weighted Average Coupon Prior							4.527834%
	Weighted Average Coupon Current							4.507437%
	Weighted Average Months to Maturity Original							332
	Weighted Average Months to Maturity Prior							283
	Weighted Average Months to Maturity Current							281
	Weighted Avg Remaining Amortization Term Original							-
	Weighted Avg Remaining Amortization Term Prior							282
	Weighted Avg Remaining Amortization Term Current							281
	Weighted Average Seasoning Original							-
	Weighted Average Seasoning Prior							113.48
	Weighted Average Seasoning Current							114.54

Note: Original information refers to deal issue.




WAC by Groups					Total WAC


WARAT by Groups					Total WARAT


Note: Dates correspond to distribution dates.
				Page 13 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Collateral Report for April 26, 2004 Distribution


	Collateral Report


ARM CHARACTERISTICS								TOTAL

	Weighted Average Margin Original							0.000%
	Weighted Average Margin Prior							2.438%
	Weighted Average Margin Current							2.437%
	Weighted Average Max Rate Original							0.000%
	Weighted Average Max Rate Prior							13.387%
	Weighted Average Max Rate Current							13.377%
	Weighted Average Min Rate Original							0.000%
	Weighted Average Min Rate Prior							3.231%
	Weighted Average Min Rate Current							3.228%
	Weighted Average Cap Up Original							0.000%
	Weighted Average Cap Up Prior							0.001%
	Weighted Average Cap Up Current							0.001%
	Weighted Average Cap Down Original							0.000%
	Weighted Average Cap Down Prior							0.001%
	Weighted Average Cap Down Current							0.001%

Note: Original information refers to deal issue.

SERVICING FEES / ADVANCES								TOTAL

	Current Servicing Fees							320,426.55
	Delinquent Servicing Fees							108,060.11

	TOTAL SERVICING FEES							428,486.66

	Total Servicing Fees							428,486.66
	Compensating Interest							0.00

	Delinquent Servicing Fees							(108,060.11)

	COLLECTED SERVICING FEES							320,426.55

	Current PPIS							0.00
	Current Net PPIS							0.00

	Total Advanced Principal For Current Payment Date							964,595.84
	Total Advanced Interest For Current Payment Date							1,189,998.27
	TOTAL ADVANCES FOR CURRENT PERIOD							2,154,594.11


ADDITIONAL COLLATERAL INFORMATION								TOTAL
SPACE INTENTIONALLY LEFT BLANK


				Page 14 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Delinquency Report for April 26, 2004 Distribution


	Delinquency Report - Total


				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance			9,603,156.12	2,326,432.37	2,199,094.99	14,128,683.48
		% Balance			0.72%	0.17%	0.17%	1.06%
		# Loans			22	7	7	36
		% # Loans			0.52%	0.16%	0.16%	0.85%
FORECLOSURE		Balance		-	-	-	2,288,596.62	2,288,596.62
		% Balance		0.00%	0.00%	0.00%	0.17%	0.17%
		# Loans		-	-	-	5	5
		% # Loans		0.00%	0.00%	0.00%	0.12%	0.12%
BANKRUPTCY		Balance		4,864,424.62	321,511.10	444,766.78	727,573.01	6,358,275.51
		% Balance		0.37%	0.02%	0.03%	0.05%	0.48%
		# Loans		13	1	1	2	17
		% # Loans		0.31%	0.02%	0.02%	0.05%	0.40%
REO		Balance		-	-	-	1,538,867.04	1,538,867.04
		% Balance		0.00%	0.00%	0.00%	0.12%	0.12%
		# Loans		-	-	-	3	3
		% # Loans		0.00%	0.00%	0.00%	0.07%	0.07%

TOTAL		Balance		4,864,424.62	9,924,667.22	2,771,199.15	6,754,131.66	24,314,422.65
		% Balance		0.37%	0.75%	0.21%	0.51%	1.83%
		# Loans		13	23	8	17	61
		% # Loans		0.31%	0.54%	0.19%	0.40%	1.44%
Note: <1 Payment = 0-29days, 1 Payment = 30-59days, 2 Payments = 60-89days, 3+ Payments = 90+
								6 Months Moving Average
1 or 2 Payments Delinquent					3 or More Payments Delinquent


Total Foreclosure					Total Bankruptcy and REO


Note: Dates correspond to distribution dates.
				Page 15 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	REO Report for April 26, 2004 Distribution


	REO Report - Mortgage Loans that Become REO During Current Distribution


SUMMARY				LOAN GROUP

Total Loan Count = 0				Loan Group 1 = ; REO Book Value = Not Available
Total Original Principal Balance = 000.00
Total Current Balance = 000.00
REO Book Value = Not Available

REO Book Value reported corresponds to total REO loans, including loans that become REO during current distribution.

Loan Number		Original	Stated		Current	State &
&		Principal	Principal	Paid to	Note	LTV at	Original	Origination
Loan Group		Balance	Balance	Date	Rate	Origination	Term	Date
SPACE INTENTIONALLY LEFT BLANK


				Page 16 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Prepayment Report for April 26, 2004 Distribution


	Prepayment Report - Voluntary Prepayments


VOLUNTARY PREPAYMENTS								TOTAL

	*Current*
	Number of Paid in Full Loans							106
	Number of Repurchased Loans							-
	Total Number of Loans Prepaid in Full							106

	Paid in Full Balance							33,590,572.79
	Repurchased Loans Balance							-
	Curtailments Amount							1,789,542.06
	Total Prepayment Amount							35,380,114.85

	*Cumulative*
	Number of Paid in Full Loans							8,572
	Number of Repurchased Loans							-
	Total Number of Loans Prepaid in Full							8,572

	Paid in Full Balance							4,959,692,713.73
	Repurchased Loans Balance							-
	Curtailments Amount							185,622,413.39
	Total Prepayment Amount							5,145,315,127.12

SPACE INTENTIONALLY LEFT BLANK


Total Prepayments by Groups (in thousands of dollars)					Total Prepayments (in thousands of dollars)


				Page 17 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Prepayment Report for April 26, 2004 Distribution


	Prepayment Report - Voluntary Prepayments


VOLUNTARY PREPAYMENT RATES								TOTAL

	SMM							2.59%
	3 Months Avg SMM							2.22%
	12 Months Avg SMM							3.54%
	Avg SMM Since Cut-off							3.08%

	CPR							26.99%
	3 Months Avg CPR							23.61%
	12 Months Avg CPR							35.15%
	Avg CPR Since Cut-off							31.29%

	PSA							449.88%
	3 Months Avg PSA Approximation							393.55%
	12 Months Avg PSA Approximation							585.79%
	Avg PSA Since Cut-off Approximation							521.43%







CPR by Groups					Total CPR


PSA by Groups					Total PSA


				Page 18 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Prepayment Report for April 26, 2004 Distribution


	Prepayment Report - Voluntary Prepayments




CPR Avg since Cut-Off by Groups					Total CPR Avg since Cut-Off


PSA Avg since Cut-Off by Groups					Total PSA Avg since Cut-Off


PREPAYMENT CALCULATION METHODOLOGY
Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases)/(Beg Principal Balance - Sched Principal)
Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)
PSA Standard Prepayment Model: CPR/(0.02*min(30,WAS))
Average SMM over period between nth month and mth month (AvgSMMn,m): [(1-SMMn) * (1-SMMn+1) .......(1-SMMm)]^(1/months in period n,m)
Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^12)
Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.02*Avg WASn,m))
Average WASn,m: (min(30,WASn)+min(30,WASn+1)+.......+min(30,WASm)/(number of months in the period n,m)
Weighted Average Seasoning (WAS)

Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments and repurchases.
Dates correspond to distribution dates.

				Page 19 of 24				© COPYRIGHT 2004 Deutsche Bank


	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Realized Loss Report for April 26, 2004 Distribution


	Realized Loss Report - Collateral


COLLATERAL REALIZED LOSSES								TOTAL

	*Current*
	Number of Loans Liquidated							-
	Collateral Realized Loss/(Gain) Amount							-
	Net Liquidation Proceeds							-

	*Cumulative*
	Number of Loans Liquidated							-
	Collateral Realized Loss/(Gain) Amount							142,848.74
	Net Liquidation Proceeds							(142,848.74)

	Note: Collateral Realized Loss Amount may include adjustments to loans liquidated in prior periods.

SPACE INTENTIONALLY LEFT BLANK


							3 Months Moving Average


Collateral Loss Severity Approximation by Groups					Collateral Loss Severity Approximation


				Page 20 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Realized Loss Report for April 26, 2004 Distribution


	Realized Loss Report - Collateral


DEFAULT SPEEDS								TOTAL

	MDR							0.00%
	3 Months Avg MDR							0.00%
	12 Months Avg MDR							0.00%
	Avg MDR Since Cut-off							0.00%

	CDR							0.00%
	3 Months Avg CDR							0.00%
	12 Months Avg CDR							0.00%
	Avg CDR Since Cut-off							0.00%

	SDA							0.00%
	3 Months Avg SDA Approximation							0.00%
	12 Months Avg SDA Approximation							0.00%
	Avg SDA Since Cut-off Approximation							0.00%

	Loss Severity Approximation for Current Period
	3 Months Avg Loss Severity Approximation
	12 Months Avg Loss Severity Approximation
	Avg Loss Severity Approximation Since Cut-off



CDR by Groups					Total CDR


SDA by Groups					Total SDA


				Page 21 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Realized Loss Report for April 26, 2004 Distribution


	Realized Loss Report - Collateral




CDR Avg since Cut-Off by Groups					Total CDR Avg since Cut-Off


SDA Avg since Cut-Off by Groups					Total SDA Avg since Cut-Off


COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY
Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)
Conditional Default Rate (CDR): 1-((1-MDR)^12)
SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)0.02,MAX(0.03,MIN(30,WAS)0.02-0.0095*(WAS-60)))
Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn) * (1-MDRn+1) .......(1-MDRm)]^(1/months in period n,m)
Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)
Average SDA Approximation over period between the nth month and mth month:
AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)0.02,MAX(0.03,MIN(30,Avg WASn,m)0.02-0.0095*(Avg WASn,m-60)))
Average WASn,m: (WASn + WASn+1 +.......+ WASm )/(number of months in the period n,m)
Loss Severity Approximation for current period: sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)
Average Loss Severity Approximation over period between nth month and mth month: Avg(Loss Severityn,m)
Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.
Dates correspond to distribution dates.

				Page 22 of 24				© COPYRIGHT 2004 Deutsche Bank


	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Realized Loss Detail Report for April 26, 2004 Distribution


	Realized Loss Detail Report - Loans Liquidated During Current Distribution

SUMMARY							LOAN GROUP
Total Loan Count Current Losses = 0
Total Loan Count Revisions = 0						Loan Group 1 =
Total Prior Principal Balance = 0.00
Total Current Realized Loss Amount = 0.00
Total Revisions Amount = 0.00
Total Realized Loss Amount = 0.00
Total Net Liquidation Proceeds = 0.00
Note: Total Realized Loss Amount may include adjustments to loans liquidated in prior periods.

Loan Number			Current	State &		Prior	Realized		Cumulative
&		Loan	Note	LTV at	Original	Principal	Loss/(Gain)	Realized	Realized
Loan Group		Status	Rate	Origination	Term	Balance	Revisions	Loss/(Gain)	Loss/(Gain)
SPACE INTENTIONALLY LEFT BLANK


					Page 23 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Additional Certificate Report for April 26, 2004 Distribution


	Additional Certificate Report


	CLASS			Carryforward Interest		Basis Risk Shortfall Reimbursed	Basis Risk Shortfall	Unpaid Basis Risk Shortfall

	A1			0.00		0.00	0.00	0.00
	A2			0.00		0.00	0.00	0.00
	M1			0.00		0.00	0.00	0.00
	M2			0.00		0.00	0.00	0.00
	M3			0.00		0.00	0.00	0.00
	B1			0.00		15,330.38	15,330.38	0.00
	B2			0.00		662.41	662.41	0.00


				Page 24 of 24				© COPYRIGHT 2004 Deutsche Bank

WASHINGTON MUTUAL MORT PS THR CERTS SER 2003-R1 8-K