After a lot of speculation and problems, Novak Djokovic confirmed through his social networks that he won't participate in the US Open. This is due to US policies that do not allow unvaccinated people to enter the country.
The Serb has already lost a lot of points and slipped down the ATP world rankings. It all started with the tournament in Australia in which he could not compete for the same reason. He won Wimbledon but received no points due to a penalty given to the competition.
By not participating in this tournament, Djokovic misses the opportunity to equal Rafael Nadal and win his 22nd Grand Slam title. There is still a possibility that he will play in the Masters' Cup tournament, but it is not certain yet.