Billie Jean King New York City and Chicago with Kloss, her life partner. 18 finals (12 titles, 6 runner-ups) Singles Billie Jean King Billie Jean King ("née" Moffitt; born November 22, 1943) is an American former World No. 1 professional tennis player. King won 39 Grand Slam titles: 12 in singles, 16 in women's doubles, and 11 in mixed doubles. She won the singles title at the inaugural WTA Tour Championships. She often represented the United States in the Federation Cup and the Wightman Cup. She was a member of the victorious United States team in seven Federation Cups and nine Wightman Cups.
Owen Davidson Owen Davidson Owen Keir Davidson (born 4 October 1943) is a former professional tennis player of the 1960s and 1970s. Partnering Billie Jean King, Davidson won eight grand slam mixed doubles titles. In 1967 he won a calendar year slam for mixed doubles, when he won the Australian Championships (with Lesley Turner Bowrey), and the French Championships, Wimbledon and the US Championships (with King). Davidson became the first player to win a match in the open era of tennis when he defeated John Clifton in the first round of the British Hard Court Championships in Bournemouth played in April 1968.