Serena Williams and Roger Federer, shown here at the Wimbledon Championships 2012 Winners Ball, are set to play each other at a mixed doubles match on New Year's Day at the Hopman Cup in Perth, Australia.
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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.
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Venus Williams, 36, will face off against her sister Serena, 35, in Saturday's Australian Open final. Williams beat fellow American Coco Vandeweghe Thursday to reach the finals.
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.
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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.
Novak Djokovic of Serbia celebrates after defeating Roger Federer in their men's singles finals tennis match at the Wimbledon Tennis Championships in London.