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Serbian tennis player Novak Djokovic celebrtaes after defeating Spanish tennis player Roberto Bautista during the Madrid Open tournament at the Caja Magica (Magic Box) sports complex in Madrid on May 5, 2016. / AFP / JAVIER SORIANO (Photo credit should read JAVIER SORIANO/AFP via Getty Images)

Serbian tennis player Novak Djokovic celebrtaes after defeating Spanish tennis player Roberto Bautista during the Madrid Open tournament at the Caja Magica (Magic Box) sports complex in Madrid on May 5, 2016. / AFP / JAVIER SORIANO        (Photo credit should read JAVIER SORIANO/AFP via Getty Images)