2019 Citi Open

The 2019 Washington Open (called the Citi Open for sponsorship reasons) was a tennis tournament played on outdoor hard courts. It was the 51st edition (for the men) and the 9th edition (for the women) of the Washington Open. The event was part of the ATP Tour 500 series of the 2019 ATP Tour, and of the WTA International tournaments of the 2019 WTA Tour. It took place at the William H.G. FitzGerald Tennis Center in Washington, D.C., United States, from July 29 to August 4, 2019.

Prize money
1 Qualifiers prize money is also the Round of 64 prize money
 * per team

Seeds

 * Rankings are as of July 22, 2019

Other entrants
The following players received wild cards into the main singles draw:
 * 🇺🇸 Christopher Eubanks
 * 🇺🇸 Bjorn Fratangelo
 * 🇺🇸 Tommy Paul
 * 🇺🇸 Jack Sock

The following players received entry from the singles qualifying draw:
 * 🇺🇸 Thai-Son Kwiatkowski
 * 🇦🇺 Marc Polmans
 * 🇨🇦 Brayden Schnur
 * 🇺🇸 Tim Smyczek
 * Mikael Torpegaard
 * 🇺🇸 Donald Young

The following players received entry as lucky losers:
 * 🇩🇪 Peter Gojowczyk
 * 🇸🇰 Norbert Gombos
 * 🇧🇾 Ilya Ivashka

Withdrawals

 * Kevin Anderson → replaced by 🇸🇰 Norbert Gombos
 * 🇨🇿 Tomáš Berdych → replaced by 🇷🇴 Marius Copil
 * 🇫🇷 Ugo Humbert → replaced by 🇧🇾 Ilya Ivashka
 * 🇫🇷 Gaël Monfils → replaced by 🇰🇿 Alexander Bublik
 * 🇯🇵 Kei Nishikori → replaced by 🇺🇸 Bradley Klahn
 * 🇺🇸 Sam Querrey → replaced by 🇹🇳 Malek Jaziri
 * 🇨🇦 Denis Shapovalov → replaced by Lloyd Harris
 * 🇦🇺 Bernard Tomic → replaced by 🇩🇪 Peter Gojowczyk

Seeds

 * 1 Rankings are as of July 22, 2019

Other entrants
The following pairs received wildcards into the doubles main draw:
 * Treat Huey / 🇺🇸 Denis Kudla
 * 🇮🇳 Leander Paes / 🇺🇸 Jack Sock

The following pair received entry from the doubles qualifying draw:
 * 🇦🇺 Matthew Ebden / 🇺🇸 Nicholas Monroe

Seeds

 * Rankings are as of July 22, 2019

Other entrants
The following players received wild cards into the main singles draw:
 * 🇺🇸 Hailey Baptiste
 * 🇺🇸 Allie Kiick
 * 🇺🇸 Caty McNally

The following player received entry using a protected ranking into the singles main draw:
 * 🇺🇸 Shelby Rogers

The following players received entry from the qualifying draw:
 * 🇺🇸 Cori Gauff
 * 🇷🇺 Varvara Gracheva
 * 🇷🇺 Anna Kalinskaya
 * 🇺🇸 Sachia Vickery

Withdrawals

 * Before the tournament
 * 🇨🇦 Bianca Andreescu → replaced by 🇺🇸 Lauren Davis
 * Belinda Bencic → replaced by 🇰🇿 Zarina Diyas
 * 🇷🇺 Margarita Gasparyan → replaced by 🇷🇺 Anna Blinkova
 * 🇨🇿 Barbora Strýcová → replaced by 🇺🇸 Shelby Rogers
 * 🇷🇺 Vera Zvonareva → replaced by 🇧🇪 Kirsten Flipkens

Seeds

 * 1 Rankings are as of July 22, 2019

Other entrants
The following pair received a wildcard into the doubles main draw:
 * 🇺🇸 Cori Gauff / 🇺🇸 Caty McNally
 * 🇺🇸 Cameron Morra / 🇺🇸 Alana Smith

Withdrawals

 * Before the tournament
 * 🇺🇸 Hayley Carter (medical condition)
 * During the tournament
 * 🇺🇸 Allie Kiick (ankle injury)

Men's singles

 * 🇦🇺 Nick Kyrgios def. 🇷🇺 Daniil Medvedev, 7−6(8−6), 7−6(7−4)

Women's singles

 * 🇺🇸 Jessica Pegula def. 🇮🇹 Camila Giorgi, 6–2, 6–2

Men's doubles

 * Raven Klaasen / 🇳🇿 Michael Venus def. Jean-Julien Rojer / 🇷🇴 Horia Tecău, 3−6, 6−3, [10−2]

Women's doubles

 * 🇺🇸 Cori Gauff / 🇺🇸 Caty McNally def. 🇺🇸 Maria Sanchez / 🇭🇺 Fanny Stollár, 6–2, 6–2