The Washington Open is a tennis tournament that takes place annually in mid-summer in Washington, it is part of the ATP Tour 500 circuit for men and the International circuit for women. Initially called the Washington Star international in 1969, the tournament was later renamed the Sovran Bank Classic. The tournament was played on Har-Tru until 1986 and subsequently on hard until today, in the William H.G. FitzGerald Tennis Center at Rock Creek Park.

Until 2008 it was part of the ATP International Series circuit, the fourth in importance, but since 2009 with the calendar reform it has been promoted to the ATP World Tour 500 series circuit, equivalent to the ATP International Series Gold.

In 2012 the men's tournament was merged with the women's one taking the name of the latter, Citi Open, thus becoming a tournament for both specialties. The 2020 edition was not held due to the COVID-19 pandemic. The 2021 women's edition was canceled due to the revocation of the license by the WTA which had assigned it to overseas tournaments. In 2022 the women's edition will be held again and at the same time as the men's.