Singles
2004 Dutch Open
Final
Champion	Martin Verkerk
Runner-up	Fernando González
Score	7–6(7–5), 4–6, 6–4
Events
Singles Doubles
← 2003 · Dutch Open · 2005 →

Nicolás Massú was the defending champion, but lost in the semifinals this year.

Martin Verkerk won the tournament, beating Fernando González in the final, 7–6^(7–5), 4–6, 6–4.

	Semifinals							Final
	1	Nicolás Massú	3	77	3
	4	Martin Verkerk	6	64	6
								4	Martin Verkerk	77	4	6
								2	Fernando González	65	6	4
		Dennis van Scheppingen	65	4
	2	Fernando González	77	6

	First round							Second round							Quarterfinals							Semifinals
	1	N Massú	6	6
		K Vliegen	3	4				1	N Massú	6	77
		R Sluiter	6	6					R Sluiter	4	64
		N Thomann	1	3											1	N Massú	6	6
		O Rochus	3	62												T Behrend	2	3
		A Portas	6	77					A Portas	2	7	2
		T Behrend	6	6					T Behrend	6	5	6
	8	A Montañés	3	0																		1	N Massú	3	77	3
	4	M Verkerk	6	3	6																	4	M Verkerk	6	64	6
	WC	M van Gemerden	4	6	1			4	M Verkerk	65	77	6
		M Rosset	5	1					A García	77	64	2
		A García	7	6											4	M Verkerk	1	77	6
	WC	P Wessels	6	3	3										5	D Sánchez	6	62	4
		J-R Lisnard	2	6	6				J-R Lisnard	2	6	3
	Q	M Przysiężny	4	4				5	D Sánchez	6	3	6
	5	D Sánchez	6	6

	First round							Second round							Quarterfinals							Semifinals
	7	A Martín	6	6
	WC	Nick van der Meer	0	4				7	A Martín	6	4	78
	Q	P Luczak	6	4	6			Q	P Luczak	4	6	66
		J van Lottum	4	6	2										7	A Martín	4	2
	Q	J Vaněk	3	6	4											D van Scheppingen	6	6
		D van Scheppingen	6	2	6				D van Scheppingen	6	6
	Q	A Falla	6	6				Q	A Falla	2	0
	3	L Horna	2	1																			D van Scheppingen	65	4
	6	I Andreev	6	6																		2	F González	77	6
		R Ramírez Hidalgo	2	2				6	I Andreev	4	6	6
		C Rochus	7	6					C Rochus	6	2	1
		F Saretta	5	3											6	I Andreev	3	5
		Ó Hernández	6	6											2	F González	6	7
		O Mutis	1	3					Ó Hernández	5	3
		J Acasuso	6	4	1			2	F González	7	6
	2	F González	4	6	6

• Main Draw
• Qualifying Draw