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Russia's Andrey Rublev serves the ball during the Umag 2017 ATP 250 tennis final match between Russia's Andrey Rublev and Italia's Paolo Lorenzi in Umag on July 23, 2017. / AFP PHOTO / Denis LOVROVIC (Photo credit should read DENIS LOVROVIC/AFP via Getty Images)

Russia's Andrey Rublev serves the ball during the Umag 2017 ATP 250 tennis final match between Russia's Andrey Rublev and Italia's Paolo Lorenzi in Umag on July 23, 2017. / AFP PHOTO / Denis LOVROVIC        (Photo credit should read DENIS LOVROVIC/AFP via Getty Images)