It won't be easy to return to previous form even if key players recover from injury. Manchester City is not only struggling with injuries to key players, but several other key players are also missing, making it difficult for Manchester City to make a comeback under the same manager. Next week, the Manchester derby will be another one, and I expect it to be a close match for both teams, as United haven't been at their best this season, so City will need to play their best to avoid embarrassment in front of their own fans.
The first difficulty in predicting this match is the derby, and the second is that both teams are far from their optimal conditions. I'm waiting for the City match to see how much Donnarumma can help their defense become better. I have no doubt that he is an excellent goalkeeper, but it is not yet clear how well he can interact with the defenders. At Manchester United, everything is still difficult, and Amorim is starting to say that he sometimes thinks about quitting.