Alexandr Dolgopolov, of Ukraine, returns the ball to Rafael Nadal, of Spain, 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

Alexandr Dolgopolov, of Ukraine, returns the ball to Rafael Nadal, of Spain, 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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