Rafael Nadal of Spain signs autographs for fans after defeating Roger Federer of Switzerland in their semifinal at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 24, 2014. (AP Photo/Aaron Favila)

Australian Open Tennis

Rafael Nadal of Spain signs autographs for fans after defeating Roger Federer of Switzerland in their semifinal at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 24, 2014. (AP Photo/Aaron Favila)

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