Spain's Maria Jose Martinez Sanchez, left, and Tommy Robredo congratulate each other while playing against America's Melanie Oudin and John Isner during their mixed doubles match, winning 6-4, 7-5 at the Hopman Cup tennis tournament in Perth, Australia ...

Maria Jose Martinez Sanchez (ESP) gives Serena Williams (USA) a run for her money at the US Open. Serena won, 6-3, 7-5. AiWire Photo via Newscom

Maria Jose Martinez Sanchez of Spain, lunges for a volley to Serena Williams of the United States, during the third round of the U.S. Open tennis tournament in New York, Friday, Sept. 4, 2009. (AP Photo/Amy Sancetta)

Maria Jose Martinez Sanchez of Spain hits a return to Serena Williams of the U.S. during their match at the U.S. Open tennis tournament in New York, September 4, 2009. REUTERS/Shaun Best (UNITED STATES SPORT TENNIS)