Serena Williams of the United States reacts after defeating Maria Sharapova of Russia to win the gold medal match of the Women's Singles Tennis on Day 8 of the London 2012 Olympic Games.
- [Clive Brunskill/Getty Images]

Maria Sharapova of Russia returns a shot against Serena Williams of the United States of America during the gold medal match of the Women's Singles Tennison Day 8 of the London 2012 Olympic Games at the All England Lawn Tennis and Croquet Club on August 4, 2012 in London, England.
- [Clive Brunskill/Getty Images]

Serena Williams of the United States reacts against Maria Sharapova of Russia during the gold medal match of the Women's Singles Tennis on Day 8 of the London 2012 Olympic Games at the All England Lawn Tennis and Croquet Club on August 4, 2012 in London, England.
- [Clive Brunskill/Getty Images]

A US supporter cheers during the women's singles gold medal match of the London 2012 Olympic Games between US Serena Williams and Russia's Maria Sharapova, at the All England Tennis Club in Wimbledon, southwest London, on August 4, 2012.
- [MARTIN BERNETTI/AFP/Getty Images]

US Serena Williams (C), Russia's Maria Sharapova (L) and Belarus' Victoria Azarenka pose with their gold, silver and bronze medals respectively, at the end of the women's singles tennis tournament of the London 2012 Olympic Games, at the All England Tennis Club in Wimbledon, southwest London, on August 4, 2012.
- [LUIS ACOSTA/AFP/Getty Images]

US Serena Williams (C), Russia's Maria Sharapova (R) and Belarus' Victoria Azarenka pose with their gold, silver and bronze medals respectively, at the end of the women's singles tennis tournament of the London 2012 Olympic Games, at the All England Tennis Club in Wimbledon, southwest London, on August 4, 2012.
- [LUIS ACOSTA/AFP/Getty Images]