Roberta Vinci, of Italy, returns the ball to Barbora Zahlavova Strycova, of the Czech Republic, at the Sony Open tennis tournament, Friday, March 21, 2014, in Key Biscayne, Fla. (AP Photo/Lynne Sladky)

Sony Open Tennis

Roberta Vinci, of Italy, returns the ball to Barbora Zahlavova Strycova, of the Czech Republic, at the Sony Open tennis tournament, Friday, March 21, 2014, in Key Biscayne, Fla. (AP Photo/Lynne Sladky)

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