İlkay, De Bruyne, Haaland and Bernardo were on the bench in this match. However, they still managed to beat Chelsea and dominate the game. No doubt they have set the bar very high. We can say that they are the best team in the world right now. They did not even give the ball to their opponents in the champions league semi-final match they played with Real Madrid. They're like Barcelona with Prime Messi. Undoubtedly, they will be the best team in the world for a long time. I can't say anything about Chelsea. They need players who can take on the role of the leading player in the team. I don't know if Neymar can do this job, but there were reports that they wanted to transfer him for a while.
Even if Manchester City choose to play with their second team, they will still be able to win Chelsea. Chelsea is not a team that can stand Manchester City as it is. That's why Pep Guardiola find it worth while to rest Kelvin De Bruyne and Haaland since they have already won the premier league and also in the finals of champions league. Rest their key players will do them good for the champion league match against Inter.
What Chelsea need is a good coach that utilize their players in a better way not more players in additions to the ones they have. There no reports of Chelsea moving to sign Neymar into the team.