Juan Martin del Potro of Argentina holds his racquet up and claps after winning his match against Nicolas Mahut of France during the Sydney International Tennis Tournament in Sydney, Australia, Wednesday, Jan. 8, 2014. (AP Photo/Rob Griffith)

Australia Tennis Sydney International

Juan Martin del Potro of Argentina holds his racquet up and claps after winning his match against Nicolas Mahut of France during the Sydney International Tennis Tournament in Sydney, Australia, Wednesday, Jan. 8, 2014. (AP Photo/Rob Griffith)

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