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.
2011 US Open (tennis) 2011 US Open (tennis) The 2011 US Open was a tennis tournament played on the outdoor hard courts at the Billie Jean King National Tennis Center in Flushing Meadows Park, of Queens, New York City, United States. It began on 29 August and was originally scheduled to end on 11 September, but the men's final was postponed to 12 September due to rain. Rafael Nadal and Kim Clijsters were the defending champions. Due to an abdominal muscle injury, Clijsters was not able to defend her title. In the women's singles, Australia's Samantha Stosur defeated Serena Williams in straight sets 6–2,