I grabbed your point. Manchester United might struggle to reach the last 16 of the Uefa Champions League and they might knock out Bayern Munich in a quarter or semi-finals If they meet. Bayern Munich should stop them from qualifying for the knockout stage of the Uefa Champions League since Manchester United is a threat.
Bayern Munich will destroy Manchester United in old Trafford. Manchester United will be desperate for a win and they will be coming so fast at Bayern Munich and Bayern will be waiting for them on the counter attack. Man United and Bayern has a history and they will give their best to make sure they don't disappoint. Even if miracle happens and Man United win Bayern Munich, they will still need a miracle to qualify as I don't see a draw in the game between Copenhagen and Galatasaray.
Manchester United does not have what it takes to beat Bayern Munich at Old Trafford. Even though Bayern Munich does not have anything to lose in that match, Bayern Munich will play attacking football because that is what they are known for. I see Manchester United losing to Bayern Munich at Old Trafford because Manchester United's dressing room is already in trouble.