Juan Martin del Potro of Argentina raises his arms as he won his final match against Bernard Tomic of Australia during the Sydney International Tennis Tournament in Sydney, Australia, Saturday, Jan. 11, 2014. Del Potro won the match 6-3, 6-1. (AP Photo/Rob Griffith)

Australia Tennis Sydney International

Juan Martin del Potro of Argentina raises his arms as he won his final match against Bernard Tomic of Australia during the Sydney International Tennis Tournament in Sydney, Australia, Saturday, Jan. 11, 2014. Del Potro won the match 6-3, 6-1. (AP Photo/Rob Griffith)

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