1966 Wimbledon Championships – Women's Singles 1966 Wimbledon Championships – Women's Singles Margaret Smith was the defending champion, but lost in the semifinals to Billie Jean King. King defeated Maria Bueno in the final, 6–3, 3–6, 6–1 to win the Ladies' Singles tennis title at the 1966 Wimbledon Championships. The second round match in which Gail Sherriff beat her sister Carol was the second match between sisters in the ladies' singles draw at Wimbledon, the first being in the 1884 Wimbledon Championships when Maud Watson beat Lillian. The next Wimbledon match between sisters in the singles draw was in 2000 between Serena and Venus Williams. Margaret
Billie Jean King Cup competition two weeks before Wimbledon but played at the All England Club, King defeated both Wade and Ann Haydon-Jones in straight sets. Although King won only one Grand Slam singles title in 1971, this was the best year of her career in terms of tournaments won (17). According to the International Tennis Hall of Fame, she played in 31 singles tournaments and compiled a 112–13 win–loss record. She started the year by winning eight of the first thirteen tournaments she played, defeating Rosemary Casals in seven finals. King's five losses during this period were to Françoise Dürr (twice), Casals