Manchester City is already not doing well lately their loss in the champions league competition against PSG didn't come as a surprise to me because if they can lose against small teams in their league I think PSG winning them is not a big deal because they are in a bad shape. Chelsea currently has a better team and performance than Manchester City if they play well they should have a win against them but looking at Manchester City's recent performance in the Premier League they seem to be doing good and I think it will not be an easy game for Chelsea to win unless they show great performance when they play Manchester City. The problem in the Manchester City team is beyond what we can think of now but Pep Guardiola will try not to lose against Chelsea since they are used to the performance of Chelsea, the game will be a tough game for Chelsea but they still have the advantage to win.
It's not just about City losing, they were dominated in the match, Pep's team has lost more times than I can remember this season, but I have not seen a team who beat them and still are able to dominate him in possession. The surprising thing is, City went ahead by 2 goals and lost 4 - 2 to a PSG side that's struggling more than City in the Champions League. Before the game, PSG were in the relegation zone, so PSG aren't doing better in the UCL even.