Not sure about Man United in the first game against Munich. I'm not sure they can bring points. With this kind of situation, Man United looks weak. Some players were injured and got some cases. It looks like Man United is a goat who came to the Tiger stable. They need a miracle to get just one point. But to qualify in the knockout phase, Man United's chances are still very open.
Even Man United has no problems with injured players and Antony's case, Man United seems still difficult to get points. The first match will be in Bayern home, Bayern players are also in their best form. Since they signed Harry Kane, Bayern looks stronger and they return to be very productive teams. They always won the match with more than 2 goals. It is very different with Man United situation, they are not in the good form lately. They only won 2 matches from 4 first matches in EPL. It means they are not in a good situation.Manchester united has problem with injured players. The club feel so difficult in finding a proper strategy when there are so many important players were injured. This news was a few weeks old but it has proven how manchester united was struggling in facing the criris on its mid and defend.
https://www.mirror.co.uk/sport/football/news/manutd-shaw-mount-injury-tenhag-30783024
That's why ten hag was let meguire to play in against arsenal. It's a hard decision for ten hag caused by he knew how garbage the quality that owned by meguire and evans.
I never imagine that how ten hag was putting those players in the last game against arsenal. It makes me feel lose my confidence with united to face bayern with terrible defenders.
I agree that Man United has a small chance to get points. However, we don't know how they can deal with the current situation. It is not impossible that Man United to get points if Bayern Munich feels nervous during the match. 
Playing away against bayern made me think MU had almost zero chance to win. I would like to take draw or lose as result from that match. Playing against bayern in allianz arena was so difficult for the club to get the points. The performances from the defensive line of manchester united must be the major concern by ten hag.
MU will be also facing brighton.