Ekaterina Makarova, of Russia, returns the ball to Angelique Kerber, of Germany, during the Sony Open tennis tournament, Monday, March 24, 2014, in Key Biscayne, Fla. (AP Photo/Luis M. Alvarez)

Sony Open Tennis

Ekaterina Makarova, of Russia, returns the ball to Angelique Kerber, of Germany, during the Sony Open tennis tournament, Monday, March 24, 2014, in Key Biscayne, Fla. (AP Photo/Luis M. Alvarez)

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