Serbia's Novak Djokovic returns the ball during the second round match of the French Open tennis tournament against France's Jeremy Chardy at the Roland Garros stadium, in Paris, France, Wednesday, May 28, 2014. (AP Photo/David Vincent)

France Tennis French Open

Serbia's Novak Djokovic returns the ball during the second round match of the French Open tennis tournament against France's Jeremy Chardy at the Roland Garros stadium, in Paris, France, Wednesday, May 28, 2014. (AP Photo/David Vincent)

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