Flavia Pennetta, of Italy, returns the ball to Ana Ivanovic, of Serbia, during the Sony Open tennis tournament, Saturday, March 22, 2014, in Key Biscayne, Fla. (AP Photo/Luis M. Alvarez)

Sony Open Tennis

Flavia Pennetta, of Italy, returns the ball to Ana Ivanovic, of Serbia, during the Sony Open tennis tournament, Saturday, March 22, 2014, in Key Biscayne, Fla. (AP Photo/Luis M. Alvarez)

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