Serena Williams of the US serves to Ai Sugiyama of Japan during the third round of the US Open tennis tournament on August 30, 2008 at the USTA National Tennis Center in New York. (TIMOTHY A. CLARY, AFP/Getty Images)
Andy Roddick of the US returns to Fabrice Santoro of France during a first round match at the US Open tennis tournament on August 27, 2008 in Flushing Meadows, NY. (DON EMMERT, AFP/Getty Images)
Serbian tennis player Jelena Jankovic smiles during a training session at the Olympic Green Tennis court in Beijing on August 7, 2008 on the eve of the opening of the 2008 Beijing Olympic Games. (BEHROUZ MEHRI, AFP/Getty Images)
Alena (L) and Kateryna Bondarenko (R) from Ukraine play against Serena and Venus Williams during a women’s doubles semi-final tennis match at the Olympic Green Tennis Centre in Beijing. (PHILIPPE HUGUEN, AFP/Getty Images)
Hungary’s Agnes Szavay hits a return to China’s Jie Jheng during their women’s singles first round tennis match at the 2008 Beijing Olympic Games on August 11, 2008. (BEHROUZ MEHRI, AFP/Getty Images)
Nicole Vaidisova of Czech Republic returns the ball to Ana Ivanovic of Serbia during the quarter finals of the Wimbledon Tennis Championships in Wimbledon, in south London, 05 July 2007. (GLENN CAMPBELL, AFP/Getty Images)
Kateryna Bondarenko of the Ukraine celebrates after defeating Ana Ivanovic of Serbia in their match of the WTA tennis tournament 04 October 2007 in Stuttgart, southern Germany. Bondarenko won the match 6-2, 1-6, 6-3. (OLIVER LANG, AFP/Getty Images)