Li Na of China, returns a shot from Caroline Wozniacki of Denmark, at the Sony Open Tennis tournament, Wednesday, March 26, 2014 in Key Biscayne, Fla. Li defeated Wozniacki 7-5, 7-5. (AP Photo/Wilfredo Lee)

Key Biscayne Tennis

Li Na of China, returns a shot from Caroline Wozniacki of Denmark, at the Sony Open Tennis tournament, Wednesday, March 26, 2014 in Key Biscayne, Fla. Li defeated Wozniacki 7-5, 7-5. (AP Photo/Wilfredo Lee)

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