Roger Federer

Associated Press
Two security guards keep an eye on the spectators as Lucas Pouille of France, right, takes a break between games in the first round match of the French Open tennis tournament against compatriot Gilles Simon at the Roland Garros stadium, in Paris, France, Monday, May 25, 2015. On Sunday a fan ran onto the court to take a selfie with Swiss Roger Federer at the end of his first round match. (AP Photo/Christophe Ena)

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One of the greatest tennis players of all time will represent Switzerland at the London Games.

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