Rafael Nadal, of Spain, returns the ball to Alexandr Dolgopolov, of Ukraine, during their final game at the Rio Open tennis tournament in Rio de Janeiro, Brazil, Sunday, Feb. 23, 2014.  (AP Photo/Silvia Izquierdo)

Brazil Rio Open Tennis

Rafael Nadal, of Spain, returns the ball to Alexandr Dolgopolov, of Ukraine, during their final game at the Rio Open tennis tournament in Rio de Janeiro, Brazil, Sunday, Feb. 23, 2014. (AP Photo/Silvia Izquierdo)

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