The ATP Washington MD, officially known as the Citi Open, is a premier men's professional tennis tournament held annually in Washington, D.C. As part of the ATP Tour Masters 1000 series, it attracts top-ranked players from around the world competing on outdoor hard courts. The tournament typically features a competitive singles and doubles draw, offering a vibrant atmosphere for tennis fans and a crucial opportunity for players to earn valuable ranking points and prepare for the US Open. With a rich history dating back to 1969, the ATP Washington MD combines high-level tennis with a lively city backdrop, making it a highlight of the North American hard court season.