Manchester City is already in the last sixteen now in the Champions League and in the middle of next month all teams including Manchester City will compete again to reach the last eight. However, without Kevin De Bruyne in the Manchester City squad this season, of course there will be a little difficulty for Manchester City to reach several important rounds in the Champions League. Because other teams have also improved rapidly in their respective strengths, Manchester City will not run smoothly in the two big competitions this season.
Manchester city have played most of their games this season without Kevin De Bruy e yet they were still able to make some good impression a d attained good position on the league table and their domestic league aswell so I think they are still doing great even in his absence,, although his presence is of great impact to the team too.
It's very true that if he is present he will be of great help to the Manchester city team especially in the champions league but then in their domestic league they may be able to cope, it will be even worse if halands absence continues because some how Manchester citys strength is built around these players but this doesn't mean they don't perform in their absence but their performance is usually different and characterized with lesser goal as with when these guys are present playing.