Serena Williams of the U.S. runs to return a shot to Maria 

Serena Williams of the U.S. runs to return a shot to Maria Sharapova of Russia during their tennis match on the final of the WTA Championships in Istanbul, Turkey, Sunday, Oct. 28, 2012. (AP Photo)
Associated Press
Serena Williams of the U.S. runs to return a shot to Maria Sharapova of Russia during their tennis match on the final of the WTA Championships in Istanbul, Turkey, Sunday, Oct. 28, 2012. (AP Photo)
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