Men's singles
2011 Western & Southern Open
Final
Champion	Andy Murray
Runner-up	Novak Djokovic
Score	6–4, 3–0 ret.
Events
Singles men women Doubles men women
← 2010 · Western & Southern Open · 2012 →

Andy Murray won the men's singles title at the 2011 Cincinnati Masters after Novak Djokovic retired from the final, with the scoreline at 6–4, 3–0. It was Murray's seventh Masters title. Djokovic's retirement in the final marked only his second defeat of the season.

Roger Federer was the two-time defending champion, but lost to Tomáš Berdych in the quarterfinals.

The top eight seeds receive a bye into the second round.

	Quarterfinals							Semifinals							Final
	1	Novak Djokovic	3	6	6
	6	Gaël Monfils	6	4	3
								1	Novak Djokovic	7	0
								8	Tomáš Berdych	5	0r
	3	Roger Federer	2	63
	8	Tomáš Berdych	6	77
															1	Novak Djokovic	4	0r
															4	Andy Murray	6	3
	10	Gilles Simon	3	3
	4	Andy Murray	6	6
								4	Andy Murray	6	710
								7	Mardy Fish	3	68
	7	Mardy Fish	6	6
	2	Rafael Nadal	3	4

	First round							Second round							Third round							Quarterfinals
								1	N Djokovic	6	6
	WC	R Harrison	6	6				WC	R Harrison	2	3
		JI Chela	3	3											1	N Djokovic	6	6
	Q	R Štěpánek	7	5	77										Q	R Štěpánek	3	3
		J Isner	5	7	64			Q	R Štěpánek	6	77
		A Golubev	3	6	6				A Golubev	3	62
	16	S Wawrinka	6	4	1																	1	N Djokovic	3	6	6
	11	A Roddick	77	5	1																	6	G Monfils	6	4	3
		P Kohlschreiber	65	7	6				P Kohlschreiber	6	6
	PR	JC Ferrero	6	3	4				F López	1	4
		F López	4	6	6											P Kohlschreiber	2	2
		I Dodig	6	77											6	G Monfils	6	6
	Q	E Gulbis	3	63					I Dodig	6	3	0r
								6	G Monfils	4	6	4

	First round							Second round							Third round							Quarterfinals
								3	R Federer	6	7
		JM del Potro	4						JM del Potro	3	5
		A Seppi	1r												3	R Federer	6	6
		M Baghdatis	6	3	2										WC	J Blake	4	1
	WC	J Blake	3	6	6			WC	J Blake	6	6
		F Fognini	6	6					F Fognini	4	2
	14	V Troicki	4	1																		3	R Federer	2	63
	9	N Almagro	77	6																		8	T Berdych	6	77
		A Montañés	65	4				9	N Almagro	6	5	77
	PR	I Karlović	6	6				PR	I Karlović	3	7	62
		F Mayer	1	3											9	N Almagro	2	2
	PR	T Haas	77	4	3										8	T Berdych	6	6
		J Mónaco	65	6	6				J Mónaco	62	0
								8	T Berdych	77	6

	First round							Second round							Third round							Quarterfinals
								5	D Ferrer	4	6	7
	Q	M İlhan	3	5				WC	G Dimitrov	6	1	5
	WC	G Dimitrov	6	7											5	D Ferrer	4	77	4
		J Tipsarević	6	3	77										10	G Simon	6	63	6
	Q	É Roger-Vasselin	0	6	65				J Tipsarević	77	2	3
		J Melzer	77	3	5			10	G Simon	63	6	6
	10	G Simon	63	6	7																	10	G Simon	3	3
	15	J-W Tsonga	6	6																		4	A Murray	6	6
		M Čilić	3	4				15	J-W Tsonga	3	4
	Q	A Bogomolov Jr.	6	6				Q	A Bogomolov Jr.	6	6
	WC	R Ginepri	4	3											Q	A Bogomolov Jr.	2	5
	Q	K Nishikori	4	4											4	A Murray	6	7
		D Nalbandian	6	6					D Nalbandian	4	1
								4	A Murray	6	6

	First round							Second round							Third round							Quarterfinals
								7	M Fish	6	6
		N Davydenko	6	77					N Davydenko	0	2
		S Stakhovsky	2	65											7	M Fish	7	7
		X Malisse	3	66											12	R Gasquet	5	5
		K Anderson	6	78					K Anderson	64	4
		A Dolgopolov	1	64				12	R Gasquet	77	6
	12	R Gasquet	6	77																		7	M Fish	6	6
	13	M Youzhny	5	6	64																	2	R Nadal	3	4
		M Llodra	7	3	77				M Llodra	4	4
		T Bellucci	3	64					F Verdasco	6	6
		F Verdasco	6	77												F Verdasco	65	77	69
		G García López	3	0r											2	R Nadal	77	64	711
	Q	J Benneteau	6	1				Q	J Benneteau	4	5
								2	R Nadal	6	7

• Main draw