Switzerland's Roger Federer plays a shot during his men's singles match against Russia's Teymuraz Gabashvili on day six of the 2014 Australian Open tennis tournament in Melbourne on January 18, 2014. IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE AFP PHOTO / PAUL CROCK
Roger Federer of Switzerland reacts after winning his semi final match against Novak Djokovic of Serbia during the day 7 of the Shanghai Rolex Masters at the Qi Zhong Tennis Center on October 11, 2014 in Shanghai, China.
Roger Federer enjoys time off Brisbane International 2015 feeding wild dolphins on Tangalooma Island Resort on January 6, 2015 in Brisbane, Queensland, Australia. The tennis legend started his 2015 campaign (ahead of the Brisbane International) with some mental relaxation and the chance to feed the wild dolphins at Tangalooma Island Resort on Moreton Island, a 75 minute boat ride from Brisbane.
Roger Federer of Switzerland waves to the crowd after winning 6-0 6-1 in the round robin singles match against Andy Murray of Great Britain on day five of the Barclays ATP World Tour Finals at O2 Arena on November 13, 2014 in London, England.
Roger Federer of Switzerland celebrates winning his Gentlemen's Singles first round match against Damir Dzumhur of Bosnia and Herzegovina during day two of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on June 30, 2015 in London, England.
Roger Federer of Switzerland celebrates winning his quarterfinal match against Andy Murray of Great Britain during day 10 of the 2014 Australian Open at Melbourne Park on January 22, 2014 in Melbourne, Australia.
Roger Federer of Switzerland reacts after defeating Marcel Granollers of Spain during their men's singles third round match on Day Seven of the 2014 US Open at the USTA Billie Jean King National Tennis Center on August 31, 2014 in the Flushing neighborhood of the Queens borough of New York City.