Mancity being the favorite to win?, Well I guess this odds were drawn based on how each teams will perform in the last 4games of the group stage, and I'm quite sure that most of the big teams won't take any of those games for granted. And also, maybe based on how these teams will perform in January, after the recovery of some of their key players, or the signing of some new players as well.
Man City should be the favorite to win the match, Man City is stronger than Feyenoord and they will play at their home. Do you doubt it?
Of course, there is no guarantee that a bigger team will win the match. But I'm sure man City won't miss the points because it will risk their position on UCL table. Man City will always try to perform well whatever the condition of their team.