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)

Brazil Rio Open Tennis

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)

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