Singles
2005 Gerry Weber Open
Final
Champion	Roger Federer
Runner-up	Marat Safin
Score	6–4, 6–7(6–8), 6–4
Details
Draw	32
Seeds	8
Events
Singles Doubles
← 2004 · Gerry Weber Open · 2006 →

Roger Federer was the two-time defending champion, and won in the final 6–4, 6–7^(6–8), 6–4, against Marat Safin.^[1] With this victory, Federer equalled Yevgeny Kafelnikov's record for three singles titles in Halle; and he became the first to win three consecutive singles titles at the tournament.^[2] Federer also won the doubles title, partnering Yves Allegro.

	Semifinals							Final
	1	Roger Federer	6	711
	7	Tommy Haas	4	69
								1	Roger Federer	6	66	6
								2	Marat Safin	4	78	4
	4	Guillermo Cañas	3	6	2
	2	Marat Safin	6	4	6

	First round							Second round							Quarterfinals							Semifinals
	1	R Federer	65	78	6
		R Söderling	77	66	4			1	R Federer	6	6
		M Youzhny	4	64					F Mayer	2	4
		F Mayer	6	77											1	R Federer	6	6
		M Llodra	62	78	2											P Kohlschreiber	3	4
	Q	Y-t Wang	77	66	6			Q	Y-t Wang	2	7	66
		P Kohlschreiber	77	6					P Kohlschreiber	6	5	78
	6	J Johansson	64	1																		1	R Federer	6	711
	3	R Nadal	6	5	3																	7	T Haas	4	69
	WC	A Waske	4	7	6			WC	A Waske	65	79	3
	Q	V Voltchkov	77	4	4			WC	JC Ferrero	77	67	6
	WC	JC Ferrero	65	6	6										WC	JC Ferrero	2	5
		J Melzer	7	63	77										7	T Haas	6	7
		A Martín	5	77	63				J Melzer	2	6	4
		J Vaněk	4	1				7	T Haas	6	3	6
	7	T Haas	6	6

	First round							Second round							Quarterfinals							Semifinals
	5	D Nalbandian	3	3
		R Schüttler	6	6					R Schüttler	6	6
		C Rochus	4	6	1			Q	D Norman	3	3
	Q	D Norman	6	3	6											R Schüttler	4	4
		N Kiefer	77	3	4										4	G Cañas	6	6
	Q	N Zimonjić	61	6	6			Q	N Zimonjić	3	63
		F Verdasco	4	4				4	G Cañas	6	77
	4	G Cañas	6	6																		4	G Cañas	3	6	2
	8	F López	77	77																		2	M Safin	6	4	6
		K Carlsen	63	65				8	F López	62	3
		C Saulnier	4	4					O Rochus	77	6
		O Rochus	6	6												O Rochus	4	64
		A Pavel	5	2											2	M Safin	6	77
		F Santoro	7	6					F Santoro	6	67	2r
	WC	A Popp	3	2				2	M Safin	3	79	3
	2	M Safin	6	6

• Draw
• Qualifying draw