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.
2010 US Open (tennis) 2010 US Open (tennis) The 2010 US Open was a tennis tournament played on outdoor hard courts, held from August 30 to September 13, 2010 in the USTA Billie Jean King National Tennis Center at Flushing Meadows, Queens, New York City, United States. The tournament was initially going to finish with Men's Singles final on September 12, but was postponed due to rain on the last day and just before the men's tournament final. In the previous two years the tournament was also postponed because of weather. Juan Martín del Potro and Kim Clijsters were the defending champions. Del Potro,