Angelique Kerber, of Germany, celebrates after defeating 6-3, 1-6, 7-6, Peng Shuai, of China, at the Sony Open tennis tournament in Key Biscayne, Fla., Thursday, March 20, 2014. (AP Photo/Alan Diaz)

Sony Open Tennis

Angelique Kerber, of Germany, celebrates after defeating 6-3, 1-6, 7-6, Peng Shuai, of China, at the Sony Open tennis tournament in Key Biscayne, Fla., Thursday, March 20, 2014. (AP Photo/Alan Diaz)

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