The chance for Manchester City to pass this stage is pretty much high and there is nearly zero chance to say Pep Guardiola and his players fail this group but the problem with Manchester City is they were not in the good form like the last season and you could see that when they were playing against Arsenal in Premier League, I think the best Manchester City can do is to start finding a weakness to be the favorite for this Champions League again.
Manchester City lost a match against Arsenal in the Premier League so it is not correct to say that Manchester City has weakened a lot in terms of performance. Sometimes bigger teams lose against smaller teams and this is not unusual. Manchester City's performance this season is a little less than last season, maybe because some important players of Manchester City are injured and they could not play any matches for Manchester City this season, but the reserve footballers that Manchester City have are definitely good player. While Manchester City's performance in the Premier League has been a bit slow, their performance in the Champions League has been normal and they will do well in this Champions League season if they improve their performance gradually.