Roger Federer of Switzerland hits a forehand in his match against Grigor Dimitrov of Bulgaria on his way to winning his 300th Grand Slam match Friday at the Australian Open in Melbourne. Michael Dodge/Getty Images hide caption

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The BBC and BuzzFeed published an investigative report alleging widespread match-fixing and corruption in the sport of tennis. The report was released just before the start of the Australian Open. Rafiq Maqbool/AP hide caption

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Novak Djokovic of Serbia celebrates after defeating Roger Federer of Switzerland during of their 2015 US Open Men's singles final match on Sunday. Jewel Samad/AFP/Getty Images hide caption

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Rafael Nadal of Spain celebrates after defeating Roger Federer of Switzerland during their semifinal Friday at the Australian Open tennis championship in Melbourne. Aaron Favila/AP hide caption

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Roger Federer of Switzerland (left) and Andy Murray of Great Britain hold up their trophies after the men's singles final match at Wimbledon Sunday. Clive Brunskill/Getty Images hide caption

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