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)

APTOPIX 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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