
Greece's Stefanos Tsitsipas celebrates winning a point against to Serbia's Novak Djokovic during their ATP Madrid Open final tennis match at the Caja Magica in Madrid on May 12, 2019. (Photo by JAVIER SORIANO / AFP via Getty Images)

Greece's Stefanos Tsitsipas celebrates winning a point against to Serbia's Novak Djokovic during their ATP Madrid Open final tennis match at the Caja Magica in Madrid on May 12, 2019. (Photo by JAVIER SORIANO / AFP via Getty Images)