United States' Serena Williams reacts during her women's singles gold medal match against Maria Sharapova of Russia at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics, Saturday, Aug. 4, 2012. Williams defeated Sharapova, winning the gold medal.(AP Photo/Victor R. Caivano)
United States' Serena Williams reacts during her women's singles gold medal match against Maria Sharapova of Russia at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics, Saturday, Aug. 4, 2012. Williams defeated Sharapova, winning the gold medal.(AP Photo/Victor R. Caivano)