Switzerland's Roger Federer celebrates his victory against Japan's Kei Nishikori during their men's singles fourth round match on day seven of the Australian Open tennis tournament in Melbourne on ... more 
Switzerland's Roger Federer celebrates his victory against Japan's Kei Nishikori during their men's singles fourth round match on day seven of the Australian Open tennis tournament in Melbourne on January 22, 2017. (AFP Photo/SAEED KHAN) less 
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AFP | Photo By SAEED KHAN
Mon, Jan 23, 2017 12:45 AM EST