Spanish tennis player Rafael Nadal (L) and Swiss's player tennis Roger Federer smile during the opening of the Rafa Nadal Academy in Manacor on October 19, 2016. / AFP / JAIME REINA (Photo credit should read JAIME REINA/AFP/Getty Images)

Spanish tennis player Rafael Nadal (L) and Swiss's player tennis Roger Federer smile during the opening of the Rafa Nadal Academy in Manacor on October 19, 2016. / AFP / JAIME REINA        (Photo credit should read JAIME REINA/AFP/Getty Images)