The Mubadala Citi DC Open in Washington, D.C. is the only combined ATP 500 and WTA 500 event, held at the William H.G. FitzGerald Tennis Center in Rock Creek Park, where fans can be close to the action. Co-founded in 1969 by Arthur Ashe, Donald Dell, and John A. Harris, it is one of the oldest pro tennis tournaments and the longest-running in a public park. The event serves as a high-stakes launchpad for the North American hard-court swing leading into the US Open, testing form after European grass and clay. The field features top Americans like Taylor Fritz and Frances Tiafoe, international stars such as Stefanos Tsitsipas, and defending champions on the women's side including Leylah Fernandez. Past champions and records highlight the event’s prestige, with notable titleists and a lineage that includes players from Ashe to Roddick. For fans, matches are broadcast on Tennis Channel and Tennis Channel 2 with streaming options, making it accessible in multiple formats.