Rafael Nadal, of Spain, reacts during his match with Alexandr Dolgopolov, of Ukraine, at the Rio Open tennis tournament in Rio de Janeiro, Brazil, Sunday, Feb. 23, 2014. (AP Photo/Silvia Izquierdo)
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)
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)
Pablo Andujar of Spain, returns the ball to Rafael Nadal, of Spain, during a semifinal match at the Rio Open tennis tournament in Rio de Janeiro, Brazil, Saturday, Feb. 22, 2014. (AP Photo/Leo Correa)