Roger Federer

Switzerland's Roger Federer, returns a ball to Andrey Golubev, of Kazakhstan, during the fourth tennis single match of the Davis Cup World Group Quarterfinal match between Switzerland and Kazakhstan, at Palexpo, in Geneva, Switzerland, Sunday, April 6, 2014. Federer won the decisive singles match on Sunday to give Switzerland a 3-2 win over Kazakhstan in the Davis Cup and a spot in the semifinals for the first time in 11 years. (AP Photo / Keystone, Salvatore Di Nolfi)

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

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