Rafael Nadal of Spain celebrates his victory over Alexandr Dolgopolov of Ukraine at the Rio Open tennis tournament in Rio de Janeiro, Brazil, Sunday, Feb. 23, 2014. Nadal returned from a troublesome back injury to win the Rio Open on Sunday. (AP Photo/Silvia Izquierdo)

Brazil Rio Open Tennis

Rafael Nadal of Spain celebrates his victory over Alexandr Dolgopolov of Ukraine at the Rio Open tennis tournament in Rio de Janeiro, Brazil, Sunday, Feb. 23, 2014. Nadal returned from a troublesome back injury to win the Rio Open on Sunday. (AP Photo/Silvia Izquierdo)

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