Men's singles
2015 Citi Open
Champion	Kei Nishikori
Runner-up	John Isner
Score	4–6, 6–4, 6–4
Draw	48 (6Q / 4WC)
Seeds	16

Milos Raonic was the defending champion, but chose not to participate this year.

Kei Nishikori won the title, defeating John Isner in the final, 4–6, 6–4, 6–4.

Seeds

All seeds receive a bye into the second round.

Click on the seed number of a player to go to their draw section.

Draw

Finals

	Quarterfinals							Semifinals							Final
		Ričardas Berankis	3	7	3
	8	John Isner	6	5	6
								8	John Isner	6	3	711
									Steve Johnson	3	6	69
	15	Jack Sock	65	1
		Steve Johnson	77	6
															8	John Isner	6	4	4
															2	Kei Nishikori	4	6	6
		Alexander Zverev	5	63
	3	Marin Čilić	7	77
								3	Marin Čilić	6	1	4
								2	Kei Nishikori	3	6	6
		Sam Groth	4	4
	2	Kei Nishikori	6	6

Top half

Section 1

	First round							Second round							Third round							Quarterfinals
								1	A Murray	4	6	64
		T Gabashvili	4	6	6				T Gabashvili	6	4	77
		B Becker	6	1	3											T Gabashvili	5	4
		R Berankis	77	6												R Berankis	7	6
		Y-h Lu	61	3					R Berankis	6	6
								14	P Cuevas	3	3
																							R Berankis	3	7	3
																						8	J Isner	6	5	6
								12	V Pospisil	7	6
		D Young	6	6					D Young	5	3
	WC	T Haas	3	4											12	V Pospisil	4	66
		V Estrella Burgos	4	6	6										8	J Isner	6	78
	WC	N Jarry	6	3	4				V Estrella Burgos	3	65
								8	J Isner	6	77

Section 2

	First round							Second round							Third round							Quarterfinals
								4	R Gasquet	5	6	6
		M Jaziri	3	5					G Müller	7	4	4
		G Müller	6	7											4	R Gasquet	77	65	4
	Q	M Matosevic	3	3											15	J Sock	64	77	6
		R Bemelmans	6	6					R Bemelmans	67	3
								15	J Sock	79	6
																						15	J Sock	65	1
																							S Johnson	77	6
								11	B Tomic	79	4	2
		L Lacko	5	3					S Johnson	67	6	6
		S Johnson	7	6												S Johnson	6	1	6
	Q	G Pella	6	67	7										6	G Dimitrov	3	6	3
	LL	I Dodig	3	79	5			Q	G Pella	61	4
								6	G Dimitrov	77	6

Bottom half

Section 3

	First round							Second round							Third round							Quarterfinals
								5	K Anderson	6	3	4
	Q	Y Nishioka	61	3					A Zverev	2	6	6
		A Zverev	77	6												A Zverev	2	6	6
		A Dolgopolov	6	6												A Dolgopolov	6	2	4
		T Smyczek	4	2					A Dolgopolov	6	77
								10	I Karlović	4	62
																							A Zverev	5	63
																						3	M Čilić	7	77
								13	S Querrey	6	5	6
	Q	D King	2	1					G Soeda	3	7	4
		G Soeda	6	6											13	S Querrey	62	63
		D Sela	2	1											3	M Čilić	77	77
		H Chung	6	6					H Chung	62	3
								3	M Čilić	77	6

Section 4

	First round							Second round							Third round							Quarterfinals
								7	F López	4	7	6
	Q	J-P Smith	3	4				WC	L Hewitt	6	5	3
	WC	L Hewitt	6	6											7	F López	3	4
		S Groth	710	4	6											S Groth	6	6
		T Bellucci	68	6	3				S Groth	6	6
								9	V Troicki	3	4
																							S Groth	4	4
																						2	K Nishikori	6	6
								16	L Mayer	77	63	6
	WC	D Kudla	6	4	65				B Rola	62	77	4
		B Rola	2	6	77										16	L Mayer	4	4
		J Duckworth	6	77											2	K Nishikori	6	6
	Q	R Harrison	1	64					J Duckworth	710	1	4
								2	K Nishikori	68	6	6

Qualifying

Qualifying draw

First qualifier

	First round							Qualifying competition
	Alt	Sekou Bangoura	3	77	67
	Alt	Takuto Niki	6	64	79
								Alt	Takuto Niki	2	4
									Marinko Matosevic	6	6
		Marinko Matosevic	6	2	78
	8	Austin Krajicek	3	6	66

Second qualifier

	First round							Qualifying competition
	2/Alt	Kyle Edmund	4	0
	Alt	Mischa Zverev	6	6
								Alt	Mischa Zverev	3	63
								7	Ryan Harrison	6	77
		Guilherme Clezar	3	77	2
	7	Ryan Harrison	6	62	6

Third qualifier

	First round							Qualifying competition
	3	Ivan Dodig	6	3	77
		Liam Broady	3	6	65
								3	Ivan Dodig	62	3
								10	Yoshihito Nishioka	77	6
	WC	Robby Ginepri	6	3	3
	10	Yoshihito Nishioka	4	6	6

Fourth qualifier

	First round							Qualifying competition
	4	James Ward	4	7	4
	Alt	Zhang Ze	6	5	6
								Alt	Zhang Ze	5	3
								Alt	Darian King	7	6
	Alt	Darian King	6	5	6
	11	Somdev Devvarman	2	7	2

Fifth qualifier

	First round							Qualifying competition
	5	Guido Pella	6	6
	WC	Jordi Arconada	4	4
								5	Guido Pella	6	6
								WC	Eric Quigley	3	4
	WC	Eric Quigley	6	5	6
	12	Yūichi Sugita	3	7	4

Sixth qualifier

	First round							Qualifying competition
	6	Alejandro González	3	6	6
	WC	Ryan Shane	6	3	2
								6	Alejandro González	63	1
								9	John-Patrick Smith	77	6
	Alt	Matija Pecotić	2	4
	9	John-Patrick Smith	6	6

References

• Main Draw
• Qualifying Draw