Bernardo Silva and Ilkay Gundogan are rumored to be leaving Manchester City soon. I know they have been important players in the Manchester City squad in recent seasons, so I think Manchester City will have a very hard time finding replacements for both of them if both players leave this season.
Gundogan has been linked with move to Barcelona, then Silva will go to PSG. If these reports are true, then of course Manchester City are in big trouble especially about finding the right replacement.
Ilkay Gundogan had a wonderful season this year. He won the admiration and respect of everyone with his performance. However, Manchester City did not offer a contract that would convince him. I think he will definitely leave the team. However, Bernardo Silva has a contract for 2 more years and is one of the most important players of the team. I don't think there is anything that requires him to leave the team. Manchester City will make a transfer to the midfield instead of Ilkay, but I don't think they will make radical changes in the starting 11. I think it would be a risky choice and Manchester City would not prefer such aggressive changes.
First of all, I don't think Manchester City is going to make big changes in the team. And secondly, even if some players do decide to leave Manchester City right now I don't think Manchester City is going to face too many problems. Manchester City is currently the best club in the world. So, I don't think they are going to have any problems trying to find players who will be as good as the players that they had, if not better. I do not think unless the players want to leave Manchester City, Manchester City is actually going to make any big changes.
You have a valid point to say Manchester City is among the best teams at the moment, but some of the players are getting closer to their end of their careers and anybody offering a little extra money should easily get the move and I see some moving in trying to secure the bag in preparation of retirement ! Besides I wonder how many young stars are ready to occupy the big shoes that will be left....
By the way, Transfer window is opening and any contracts coming to an end risk City losing out on any potential revenue, and to counter this...City should sell to avoid players walking out as free agents, they better act quick !