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.
1970 Wimbledon Championships – Women's Singles the Calendar Grand Slam in the Open Era. Margaret Court (Champion) 1970 Wimbledon Championships – Women's Singles Ann Jones was the defending champion, but she did not defend her title as she had retired from Grand Slam singles competition. Margaret Court won the title, defeating Billie Jean King in the final, 14–12, 11–9. This was Court's third Wimbledon title, her third Grand Slam of the year, her fourth consecutive Grand Slam title and her nineteenth Grand Slam overall. Court became the first woman to complete the Career Grand Slam in the Open Era. She would win the remaining Grand Slam