Klara Zakopalova of the Czech Republic returns the ball to Teliana Pereira of Brazil at the Rio Open tennis tournament in Rio de Janeiro, Brazil, Saturday, Feb. 22, 2014. (AP Photo/Leo Correa)
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Klara Zakopalova of the Czech Republic returns the ball to Teliana Pereira of Brazil at the Rio Open tennis tournament in Rio de Janeiro, Brazil, Saturday, Feb. 22, 2014. (AP Photo/Leo Correa)
