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Slovak Dominika Cibulkova returns a ball during her game against German Annika Beck at the Generali Ladies Tennis Tournament in Linz, Austria, on October 13, 2016. / AFP / APA / HELMUT FOHRINGER / Austria OUT (Photo credit should read HELMUT FOHRINGER/AFP/Getty Images)

Slovak Dominika Cibulkova returns a ball during her game against German Annika Beck at the Generali Ladies Tennis Tournament in Linz, Austria, on October 13, 2016.  / AFP / APA / HELMUT FOHRINGER / Austria OUT        (Photo credit should read HELMUT FOHRINGER/AFP/Getty Images)