Germany's Andrea Petkovic celebrates winning the first set of the quarterfinal match of the French Open tennis tournament against Italy's Sara Errani at the Roland Garros stadium, in Paris, France, Wednesday, June 4, 2014.  (AP Photo/Darko Vojinovic)

France Tennis French Open

Germany's Andrea Petkovic celebrates winning the first set of the quarterfinal match of the French Open tennis tournament against Italy's Sara Errani at the Roland Garros stadium, in Paris, France, Wednesday, June 4, 2014. (AP Photo/Darko Vojinovic)

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