The player injuries experienced by Real Madrid at this time could indeed be an obstacle for Real Madrid to perform well in every match, but I also believe in the level of consistency of the current Real Madrid team. Because Real Madrid's mentality in the Champions League is always very big and Ancelotti himself certainly knows what to do and give his best for the team with the current conditions even though one of them is having to be smart enough in rotating players when the match schedule looks quite close for several competitions.
I doubt that Real will have any problems in the group stage of the Champions League, and given the new format, even if there are a few unexpected results, it will still not prevent them from getting out of the group. Militao will be back in a few weeks, and without Alaba they have been playing for a long time, Bellingham, in my opinion, is also ready to play, so Ancelotti does not have big problems with the squad, any injury is unpleasant for a coach, you can’t prepare for it. Now Real will have an important match with Real Sociedad, because they cannot lose points in La Liga.