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.
1971 US Open (tennis) / Françoise Dürr, 6–3, 6–3 Billie Jean King / Owen Davidson defeated Betty Stöve / Robert Maud, 6–3, 7–5 1971 US Open (tennis) The 1971 US Open was a tennis tournament that took place on the outdoor grass courts at the Forest Hills, Queens in New York City, USA. The tournament ran from 1 September until 12 September. It was the 91st staging of the US Open, and the fourth Grand Slam tennis event of 1971. Stan Smith defeated Jan Kodeš, 3–6, 6–3, 6–2, 7–6 Billie Jean King defeated Rosemary Casals, 6–4, 7–6 John Newcombe / Roger Taylor defeated Stan