Dominika Cibulkova, of Slovakia, celebrates after defeating Agnieszka Radwanska, of Poland, at the Sony Open Tennis tournament in Key Biscayne, Fla., Wednesday, March 26, 2014. Cibulkova won 3-6, 7-6 (5), 6-3. (AP Photo/Joel Auerbach)

Key Biscayne Tennis

Dominika Cibulkova, of Slovakia, celebrates after defeating Agnieszka Radwanska, of Poland, at the Sony Open Tennis tournament in Key Biscayne, Fla., Wednesday, March 26, 2014. Cibulkova won 3-6, 7-6 (5), 6-3. (AP Photo/Joel Auerbach)

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