Roger Federer Roger Federer

Switzerland's Roger Federer defeated Croatia's Marin Cilic to win his record eighth men's singles title at the Wimbledon Tennis Championships in London Sunday. Daniel Leal-Olivas/AP hide caption

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Daniel Leal-Olivas/AP

Venus Williams and Spain's Garbine Muguruza each compete in the 2017 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London. Williams will face Muguruza in the women's singles final on Saturday. Adrian Dennis and Frank Augstein/AFP/Getty Images hide caption

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Adrian Dennis and Frank Augstein/AFP/Getty Images

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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Michael Dodge/Getty Images

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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Rafiq Maqbool/AP

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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Jewel Samad/AFP/Getty Images

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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Aaron Favila/AP

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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Clive Brunskill/Getty Images