Washington Open (tennis)

Washington Open
2024 Washington Open
Tournament information
Tour	ATP Tour WTA Tour
Founded	1969; 55 years ago (1969)
Location	Washington, D.C.
Venue	William H.G. FitzGerald Tennis Center
Category	ATP Tour 500 WTA 500
Surface	Hardcourt
Draw	48S/24Q/16D (men) 32S/16Q/16D (women)
Prize money	US$2,013,940 (2023) (men) US$922,573 (2024) (women)
Website	mubadalacitidcopen.com
Current champions (2024)
Men's singles	Sebastian Korda
Women's singles	Paula Badosa
Men's doubles	Nathaniel Lammons Jackson Withrow
Women's doubles	Asia Muhammad Taylor Townsend

The Washington Open (branded as the Mubadala Citi DC Open for sponsorship reasons and sometimes called the DC Open) is an annual professional outdoor hardcourt tennis tournament played at the William H.G. FitzGerald Tennis Center in Rock Creek Park in Washington, D.C. The event is categorized as an ATP 500 event on the ATP Tour and a WTA 500 event on the WTA Tour. The tournament is owned and managed by Mark Ein in partnership with IMG.

Organized annually in the summer schedule of events on North American hardcourts leading up to the US Open, known as the US Open Series, the Washington Open was first held in 1969 as the Washington Star International. It was held on clay courts until 1986, when the surface was changed to hardcourts. In 2011, the event expanded to include its first women's tournament, a WTA International (now WTA 250) competition held in a separate venue in College Park, Maryland. The following year, the men's and women's events were consolidated at the Washington venue.

In 2023, the WTA 500-level Silicon Valley Classic was discontinued and merged into the Washington Open, forming the first and only joint-500-level event on the ATP and WTA tours.