The 2015 Citi Open was a tennis tournament played on outdoor hard courts. It was the 47th edition (for the men) and the 5th edition (for the women) of the Washington Open. The event was part of the ATP World Tour 500 series of the 2015 ATP World Tour, and of the WTA International tournaments of the 2015 WTA Tour. It took place at the William H.G. FitzGerald Tennis Center in Washington, D.C., United States, from August 3 to August 9, 2015.

Event	W	F	SF	QF	Round of 16	Round of 32	Round of 64	Q	Q2	Q1
Men's singles	500	300	180	90	45	20	0	10	4	0
Men's doubles					0	—	—		—
Women's singles	280	180	110	60	30	1	—	18	12	1
Women's doubles					1	—	—	—	—	—

Event	W	F	SF	QF	Round of 16	Round of 32	Round of 641	Q2	Q1
Men's singles	$316,400	$142,650	$67,570	$32,605	$16,625	$9,150	$5,325	$850	$440
Men's doubles *	$93,460	$42,180	$19,890	$9,610	$4,920	—	—	—	—
Women's singles	$43,000	$21,400	$11,300	$6,200	$3,420	$2,220	—	$1,285	$750
Women's doubles *	$12,300	$6,400	$3,435	$1,820	$960	—	—	—	—

<sub>¹ Qualifiers prize money is also the Round of 64 prize money
* per team</sub>

Country	Player	Rank1	Seed
GBR	Andy Murray	3	1
JPN	Kei Nishikori	5	2
CRO	Marin Čilić	9	3
FRA	Richard Gasquet	13	4
RSA	Kevin Anderson	15	5
BUL	Grigor Dimitrov	16	6
ESP	Feliciano López	18	7
USA	John Isner	19	8
SRB	Viktor Troicki	20	9
CRO	Ivo Karlović	22	10
AUS	Bernard Tomic	25	11
CAN	Vasek Pospisil	29	12
USA	Sam Querrey	30	13
URU	Pablo Cuevas	31	14
USA	Jack Sock	35	15
ARG	Leonardo Mayer	36	16

• ¹ Rankings are as of July 27, 2015

The following players received wild cards into the main singles draw:

• Tommy Haas
• Lleyton Hewitt
• Nicolás Jarry
• Denis Kudla

The following players received entry from the singles qualifying draw:

• Ryan Harrison
• Darian King
• Marinko Matosevic
• Yoshihito Nishioka
• Guido Pella
• John-Patrick Smith

The following player received entry as lucky loser:

• Ivan Dodig

Before the tournament

• Marcos Baghdatis → replaced by Ivan Dodig
• Thanasi Kokkinakis → replaced by Go Soeda
• Adrian Mannarino → replaced by Lukáš Lacko
• Janko Tipsarević → replaced by Ričardas Berankis

Country	Player	Country	Player	Rank1	Seed
USA	Bob Bryan	USA	Mike Bryan	1	1
CRO	Ivan Dodig	BRA	Marcelo Melo	7	2
IND	Rohan Bopanna	ROU	Florin Mergea	18	3
POL	Marcin Matkowski	SRB	Nenad Zimonjić	21	4

• ¹ Rankings are as of July 27, 2015

The following pairs received wildcards into the doubles main draw:

• Sam Groth / Lleyton Hewitt
• Steve Johnson / Sam Querrey

The following pair received entry from the doubles qualifying draw:

• Austin Krajicek / Nicholas Monroe

The following pair received entry as lucky loser:

• Treat Huey / Scott Lipsky

Before the tournament

• Pablo Cuevas (back injury)

Country	Player	Rank 1	Seed
RUS	Ekaterina Makarova	11	1
AUS	Samantha Stosur	21	2
SUI	Belinda Bencic	22	3
RUS	Svetlana Kuznetsova	24	4
FRA	Alizé Cornet	28	5
ROU	Irina-Camelia Begu	29	6
USA	CoCo Vandeweghe	32	7
KAZ	Zarina Diyas	33	8

• ¹ Rankings are as of July 27, 2015

The following players received wild cards into the main singles draw:

• Louisa Chirico
• Taylor Townsend
• CoCo Vandeweghe

The following players received entry from the singles qualifying draw:

• Naomi Broady
• Julia Glushko
• Sanaz Marand
• An-Sophie Mestach

Before the tournament

• Victoria Azarenka → replaced by Polona Hercog
• Eugenie Bouchard → replaced by Lauren Davis
• Sara Errani → replaced by Irina Falconi
• Daniela Hantuchová → replaced by Lara Arruabarrena

Country	Player	Country	Player	Rank1	Seed
RUS	Alla Kudryavtseva	RUS	Anastasia Pavlyuchenkova	52	1
AUS	Anastasia Rodionova	AUS	Arina Rodionova	64	2
ESP	Lara Arruabarrena	SLO	Andreja Klepač	72	3
SUI	Belinda Bencic	FRA	Kristina Mladenovic	101	4

• ¹ Rankings are as of July 27, 2015

The following pair received a wildcard into the doubles main draw:

• Louisa Chirico / Alizé Lim

• Kei Nishikori def. John Isner, 4–6, 6–4, 6–4

• Sloane Stephens def. Anastasia Pavlyuchenkova, 6–1, 6–2

• Bob Bryan / Mike Bryan def. Ivan Dodig / Marcelo Melo, 6–4, 6–2

• Belinda Bencic / Kristina Mladenovic def. Lara Arruabarrena / Andreja Klepač, 7–5, 7–6^(9–7)

• Official website