The Washington Kastles are the winningest franchise in World TeamTennis history. The team has won a historic five-straight and six total WTT titles. As part of the legendary Five-Peat, Washington set a major U.S. pro sports record with a 34-match win streak. Since the franchise's launch in 2008, the Kastles have featured eight World No. 1 players: Serena & Venus Williams, Bob & Mike Bryan, Martina Hingis, Leander Paes, Rennae Stubbs and Victoria Azarenka.