All the entry regulations in reference to the Corona Vaccination are lifted in the USA at 11 May. This will allow Djokovic to play at the US Open and chase another Grand Slam title. However, it is not certain whether he will remain number 1 in the world rankings. In any case he will not be allowed to play at the tournaments in Indian Wells and Miami. So his pursuers have two possibilities to get closer to him or even to regain spot number 1.
This is amazing news for Novak Djokovic and now he has a chance again to attack all 4 grand slams to win them in a year. With the level he is playing he might win them all. Only the French open might be a big problem for him due to him playing on clay where he isnt the best.
Djokovic has the Australian Open with a great display of power. But Alcaraz was not there, the number 1 in the world. He would have had a really hard time with that. And against Nadal in good form too. But Alcaraz had to miss this tournament due to an injury and Nadal was actually unable to continue in the 2nd round. If both had been fit, it would have been a lot more difficult for Djokovic. Perhaps most memorable was Murray's performance, who at times returned to his old level of 10 years ago when he was among the best tennis players in the world at the time. Yet with Murray I always felt that he was in the shadow of players like Djokovic, Federer and Nadal.