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.
Billie Jean King only 13 points while defeating Rosemary Casals in the semifinals 6–1, 6–0; however, Jones upset King in the final and prevented King from winning her fourth consecutive singles title there. The week after, King again defeated Wade to win the Irish Open for the second time in her career. In the final Grand Slam tournament of the year, King lost in the quarterfinals of the US Open to Nancy Richey Gunter 6–4, 8–6. This was the first year since 1965 that King did not win at least one Grand Slam singles title. King finished the year with titles at the