Roger Federer of Switzerland serves to Blaz Kavcic of Slovenia during their second round match at the Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 16, 2014.(AP Photo/Rick Rycroft)

Australian Open Tennis

Roger Federer of Switzerland serves to Blaz Kavcic of Slovenia during their second round match at the Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 16, 2014.(AP Photo/Rick Rycroft)

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