United States' Serena Williams, left, talks to partner Venus Williams, right, as they play against Czech Republic's Lucie Hradecka and Andrea Hlavackova in a women's doubles gold medal tennis match at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics, Sunday, Aug. 5, 2012. (AP Photo/Victor R. Caivano)
United States' Serena Williams, left, talks to partner Venus Williams, right, as they play against Czech Republic's Lucie Hradecka and Andrea Hlavackova in a women's doubles gold medal tennis match at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics, Sunday, Aug. 5, 2012. (AP Photo/Victor R. Caivano)
