Roger Federer

Switzerland's Roger Federer returns a ball to Bulgaria's Grigor Dimitrov during their quarter-final tennis match at the Swiss Indoors ATP tournament in Basel on Oct. 25.

( Fabrice Coffrini/ AFP/Getty Images )

Switzerland's Roger Federer returns a ball to Bulgaria's Grigor Dimitrov during their quarter-final tennis match at the Swiss Indoors ATP tournament in Basel on Oct. 25.

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