The 2017 Citi Open was a tennis tournament played on outdoor hard courts. It was the 49th edition (for the men) and the 7th edition (for the women) of the Washington Open. The event is part of the ATP World Tour 500 series of the 2017 ATP World Tour, and of the WTA International tournaments of the 2017 WTA Tour. It took place at the William H.G. FitzGerald Tennis Center in Washington, D.C., United States, from July 31 to August 6, 2017.
1 Qualifiers prize money is also the Round of 64 prize money
* per team
The following players received wild cards into the main singles draw:
The following player received entry using a protected ranking:
The following players received entry from the singles qualifying draw:
The following player received entry as a lucky loser:
Dan Evans →replaced by .svg/1280px-Flag_of_Belgium_(civil).svg.png){kind=small}
Ruben Bemelmans
John Isner →replaced by .svg/1280px-Flag_of_Australia_(converted).svg.png){kind=small}
Marc Polmans
Illya Marchenko →replaced by Reilly Opelka Bernard Tomic →replaced by Stefan KozlovThe following pairs received wildcards into the doubles main draw:
The following pair received entry from the doubles qualifying draw:
The following players received wild cards into the main singles draw:
The following players received entry from the qualifying draw:
Daria Kasatkina →replaced by 
Patricia Maria Țig
Yulia Putintseva →replaced by .svg/1280px-Flag_of_Canada_(Pantone).svg.png){kind=small}
Françoise Abanda
Francesca Schiavone (entered Stanford tournament) →replaced by 
Aryna Sabalenka Yaroslava Shvedova →replaced by 
Mariana Duque Mariño Samantha Stosur →replaced by 
Jana ČepelováThe following pair received a wildcard into the doubles main draw:
Alexander Zverev defeated 
Kevin Anderson 6–4, 6–4. Ekaterina Makarova defeated Julia Görges 3–6, 7–6(7–2), 6–0.
Henri Kontinen / John Peers defeated 
Łukasz Kubot / 
Marcelo Melo 7–6(7–5), 6–4
Shuko Aoyama / 
Renata Voráčová defeated Eugenie Bouchard / Sloane Stephens, 6–3, 6–2
