Singles
2011 International German Open
Final
Champion	Gilles Simon
Runner-up	Nicolás Almagro
Score	6–4, 4–6, 6–4
Details
Draw	48
Seeds	16
Events
Singles Doubles
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The 2011 International German Open was the 105th edition of the International German Open, a men's tennis tournament held that year in Hamburg, Germany. Part of the ATP World Tour 500 series of the 2011 ATP World Tour, the games would last from 18 July through 24 July 2011. Andrey Golubev was the defending champion, but lost to Philipp Kohlschreiber in the first round.

Gilles Simon won in the final 6–4, 4–6, 6–4, against Nicolás Almagro.

All seeds received a bye into the second round.

	Quarterfinals							Semifinals							Final
	1	Gaël Monfils	4	6	0
	5	Gilles Simon	6	3	6
								5	Gilles Simon	3	6	6
								4	Mikhail Youzhny	6	3	1
	4	Mikhail Youzhny	4	6	78
	12	Marin Čilić	6	3	66
															5	Gilles Simon	6	4	6
															3	Nicolás Almagro	4	6	4
	6	Florian Mayer	65	63
	3	Nicolás Almagro	77	77
								3	Nicolás Almagro	6	6
								8	Fernando Verdasco	4	1
	8	Fernando Verdasco	6	2	6
	2	Jürgen Melzer	3	6	4

	First round							Second round							Third round							Quarterfinals
								1	G Monfils	6	6
		A Mannarino	2	4				Q	A Ramos	4	2
	Q	A Ramos	6	6											1	G Monfils	6	6
		R Štěpánek	7	77												R Štěpánek	4	4
	WC	A Beck	5	62					R Štěpánek	6	7
								13	A Seppi	1	5
																						1	G Monfils	4	6	0
																						5	G Simon	6	3	6
								10	A Dolgopolov	3	6	4
		J Nieminen	6	6					J Nieminen	6	1	6
		S Giraldo	4	3												J Nieminen	64	6	4
		S Stakhovsky	6	6											5	G Simon	77	3	6
		M González	2	3					S Stakhovsky	2	1
								5	G Simon	6	6

	First round							Second round							Third round							Quarterfinals
								4	M Youzhny	7	79
		C Berlocq	6	6					C Berlocq	5	67
		R Haase	2	2											4	M Youzhny	6	6
		D Istomin	3	4											WC	J Reister	3	3
	WC	J Reister	6	6				WC	J Reister	77	6
								14	G García López	65	2
																						4	M Youzhny	4	6	78
																						12	M Čilić	6	3	66
								12	M Čilić	6	64	6
	Q	B Knittel	6	6				Q	B Knittel	3	7	4
		I Dodig	4	3											12	M Čilić	3	6	6
	WC	T Kamke	6	6											WC	T Kamke	6	3	2
		P Riba	1	1				WC	T Kamke	6	6
								7	JI Chela	1	4

	First round							Second round							Third round							Quarterfinals
								6	F Mayer	6	77
	Q	M İlhan	6	4	77			Q	M İlhan	4	65
		P Petzschner	2	6	65										6	F Mayer	7	7
	Q	S Bolelli	3	5												J Mónaco	5	5
		J Mónaco	6	7					J Mónaco	6	6
								9	J Tipsarević	2	4
																						6	F Mayer	65	63
																						3	N Almagro	77	77
								16	A Montañés	1	2r
		A Golubev	5	3					P Kohlschreiber	6	3
		P Kohlschreiber	7	6												P Kohlschreiber	3	5
	LL	L Rosol	77	6											3	N Almagro	6	7
		P Starace	65	1				LL	L Rosol	4	4
								3	N Almagro	6	6

	First round							Second round							Third round							Quarterfinals
								8	F Verdasco	6	6
		J Benneteau	2	2					P Andújar	2	3
		P Andújar	6	6											8	F Verdasco	7	6
		JC Ferrero	3	2											WC	C-M Stebe	5	2
	WC	C-M Stebe	6	6				WC	C-M Stebe	6	77
								11	N Davydenko	3	65
																						8	F Verdasco	6	2	6
																						2	J Melzer	3	6	4
								15	F Fognini	6	7
	Q	V Crivoi	6	6				Q	V Crivoi	1	5
	Q	G Olaso	4	3											15	F Fognini	2	3
		M Granollers	3	r											2	J Melzer	6	6
		D Gimeno Traver	6						D Gimeno Traver	3	7	1
								2	J Melzer	6	5	6

• Main draw