Samuel Groth of Australia returns to Vasek Pospisil of Canada  during their first round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 13, 2014. (AP Photo/Aaron Favila)

Australian Open Tennis

Samuel Groth of Australia returns to Vasek Pospisil of Canada during their first round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 13, 2014. (AP Photo/Aaron Favila)

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