Singles
2004 Mercedes Cup
Final
Champion	Guillermo Cañas
Runner-up	Gastón Gaudio
Score	5–7, 6–2, 6–0, 1–6, 6–3
Details
Draw	48
Seeds	16
Events
Singles Doubles
← 2003 · Stuttgart Open · 2005 →

Guillermo Coria was the defending champion,^[1] but did not participate.

Guillermo Cañas won the title, defeating Gastón Gaudio 5–7, 6–2, 6–0, 1–6, 6–3 in the final.^[2]

All seeds receive a bye into the second round.

	Quarterfinals							Semifinals							Final
	Radek Štěpánek		4	4
	Guillermo Cañas		6	6
									Guillermo Cañas	3	6	6
								15	Nikolay Davydenko	6	1	2
	15	Nikolay Davydenko	6	6
	12	Albert Costa	3	4
																Guillermo Cañas	5	6	6	1	6
															2	Gastón Gaudio	7	2	0	6	3
	11	David Ferrer	6	63	7
	14	Rafael Nadal	3	77	5
								11	David Ferrer	3	7	4
								2	Gastón Gaudio	6	5	6
	5	Jiří Novák	4	3
	2	Gastón Gaudio	6	6

	First round							Second round							Third round							Quarterfinals
								1	R Schüttler	78	3	2
		JP Guzmán	64	3					R Štěpánek	66	6	6
		R Štěpánek	77	6												R Štěpánek	6	7
	Q	F Squillari	6	77											13	I Karlović	2	5
		N Almagro	3	61				Q	F Squillari	3	60
								13	I Karlović	6	77
																							R Štěpánek	4	4
																							G Cañas	6	6
								9	F Mayer	77	65	4
		D Norman	0	5					G Cañas	63	77	6
		G Cañas	6	7												G Cañas	6	6
		S Koubek	6	77												S Koubek	4	2
		O Patience	2	65					S Koubek	6	6
								7	F López	3	4

	First round							Second round							Third round							Quarterfinals
								4	A Pavel	6	6
		V Hănescu	63	1r					B Ulihrach	1	1
		B Ulihrach	77	4											4	A Pavel	5	6	4
	WC	A Beck	77	6											15	N Davydenko	7	1	6
		A Peya	62	1				WC	A Beck	3	3
								15	N Davydenko	6	6
																						15	N Davydenko	6	6
																						12	A Costa	3	4
								12	A Costa	7	6
		F Mantilla	61	6	6				F Mantilla	5	4
	Q	J Haehnel	77	2	2										12	A Costa	7	77
		M López	6	65	6										8	M Zabaleta	5	64
	WC	D Elsner	1	77	3				M López	62	2
								8	M Zabaleta	77	6

	First round							Second round							Third round							Quarterfinals
								6	T Robredo	1	4
	Q	R Gasquet	6	6				Q	R Gasquet	6	6
	LL	É Roger-Vasselin	2	4											Q	R Gasquet	4	2
		A Di Pasquale	6	6											11	D Ferrer	6	6
		G Blanco	3	1					A Di Pasquale	4	6	1
								11	D Ferrer	6	1	6
																						11	D Ferrer	6	63	7
																						14	R Nadal	3	77	5
								14	R Nadal	77	6
	Q	P Kohlschreiber	3	6	2				M Vassallo Argüello	64	4
		M Vassallo Argüello	6	3	6										14	R Nadal	6	6
	Q	JF Andersen	6	6											3	JI Chela	2	3
		L Burgsmüller	4	2				Q	JF Andersen	3	1
								3	JI Chela	6	6

	First round							Second round							Third round							Quarterfinals
								5	J Novák	6	6
		T Ascione	6	710					T Ascione	2	4
		T Zíb	3	68											5	J Novák	77	4	6
	WC	A Waske	2	6	1										10	M Youzhny	64	6	1
		A Popp	6	1	6				A Popp	3	67
								10	M Youzhny	6	79
																						5	J Novák	4	3
																						2	G Gaudio	6	6
								16	T Berdych	6	6
	LL	B Phau	6	6				LL	B Phau	2	3
		I Heuberger	3	2											16	T Berdych	2	4
	Q	H Armando	6	6											2	G Gaudio	6	6
	WC	S Rieschick	1	4				Q	H Armando	6	2	65
								2	G Gaudio	3	6	77

• Main draw
• Qualifying draw