Thanks to the extraordinary feat achieved at the Australian Open, Rafael Nadal has scored his 21st Grand Slam. In a tournament that had often been hostile to him in the past, the Spanish phenomenon has achieved a ride that is nothing short of memorable.After surviving two real battles against Denis Shapovalov and Matteo Berrettini, the former world number 1 came back two sets behind Daniil Medvedev in the final. The Majorcan thus overtook Roger Federer and Novak Djokovic in the all-time rankings of the Majors, as well as becoming the fourth man in history to have won all the Grand Slams at l …