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AP Serena Williams, plays doubles tennis with Venus Williams, during their match against Klaudia Jans-Ignacik, of Poland, and Kristina Mladenovic, of Fra - Photo

Serena Williams, plays doubles tennis with Venus Williams, during their match against Klaudia Jans-Ignacik, of Poland, and Kristina Mladenovic, of Fra

Friday August 31, 11:17 PM
Serena Williams, plays doubles tennis with Venus Williams, during their match against Klaudia Jans-Ignacik, of Poland, and Kristina Mladenovic, of France, in the third round of play at the 2012 US Open tennis tournament, Friday, Aug. 31, 2012, in New York. (AP Photo/Mike Groll)