Bulgaria's Grigor Dimitrov waits to serve the ball during the first round match of the French Open tennis tournament against Croatia's Ivo Karlovic at the Roland Garros stadium, in Paris, France, Tuesday, May 27, 2014. (AP Photo/Michel Spingler)

France Tennis French Open

Bulgaria's Grigor Dimitrov waits to serve the ball during the first round match of the French Open tennis tournament against Croatia's Ivo Karlovic at the Roland Garros stadium, in Paris, France, Tuesday, May 27, 2014. (AP Photo/Michel Spingler)

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