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Tomas Berdych of Czech Republic returns the ball to Paolo Lorenzi of Italy during the St. Petersburg Open ATP tennis tournament match in St. Petersburg, Russia, September 23, 2016. (Photo by Igor Russak/NurPhoto via Getty Images)

Tomas Berdych of Czech Republic returns the ball to Paolo Lorenzi of Italy during the St. Petersburg Open ATP tennis tournament match in St. Petersburg, Russia, September 23, 2016. (Photo by Igor Russak/NurPhoto via Getty Images)