Maria Sharapova of Russia grimaces as she returns a shot to Samantha Stosur of Australia during their tennis match on the fourth day of the WTA championship in Istanbul, Turkey, Friday

 

              Maria Sharapova of Russia grimaces as she returns a shot to Samantha Stosur of Australia  during their tennis match on the fourth day of the WTA championship in Istanbul, Turkey, Friday
Maria Sharapova of Russia grimaces as she returns a shot to Samantha Stosur of Australia during their tennis match on the fourth day of the WTA championship in Istanbul, Turkey, Friday, Oct. 26, 2012. (AP Photo)