US Open starts in a month or so, even if he was injured it will heal properly until then.
It has to be said though that Đoković is one of the worst losers in sport. He always finds some injury or whatever, I remember when he was playing in Doha and Lopez was kicking his ass taht he forfeited because he said that sand got into his eyes. Then when he lost last season he said he couldn't play properly because some holy man died in Serbia or whatever.
Don't get me wrong, he's probably going to retire as a player with the most Grand Slams in tennis. But when he loses, it was never because the opponent was better.
I agree for 100% and that's exactly the reason why I don't like Djokovic. Federer or Nadal will always admit, that if they are beaten cleanly, that there opponent was simply better. While Djokovic will probably win the most GS, he will never ever be the GOAT in tennis but that's another discussion.
I think if you talk about the term GOAT by now we should really distinguish between the player as a person and they player as a player. Some argue that Ronaldo is the GOAT in soccer, but really? If you look at his attitude that's not quite possible. If you look at his as purely a soccer player, maybe yes, even though I stick with Messi here. Same in the formula 1, same in tennis.
I am quite sure Djokovic will set a GS win record that might never be broken again for the next 100 years, but as a person he puts himself out there in a pretty bad light. But that is the same for Zverev (big time).