Serena Williams of the U.S. returns the ball to Petra Kvitova of Czech Republic during their quarterfinal of the WTA Qatar Ladies Open tennis tournament in Doha, Qatar, Friday, Feb. 15,

 

              Serena Williams of the U.S. returns the ball to Petra Kvitova of Czech Republic during their quarterfinal of the WTA Qatar Ladies Open tennis tournament in Doha, Qatar, Friday, Feb. 15,
Serena Williams of the U.S. returns the ball to Petra Kvitova of Czech Republic during their quarterfinal of the WTA Qatar Ladies Open tennis tournament in Doha, Qatar, Friday, Feb. 15, 2013. (AP Photo/Osama Faisal)