I believe you made a typo, your post says PSG will face RB Leipzig this weekend but RB Leipzig are in the German Bundesliga and PSG are French Ligue 1 and even in the Champions league, PSG is not even going to play Leipzig instead PSG is playing Salzburg and RB Leipzig are playing Aston Villa.
Lol, probably because both Leipzig and Salzburg are Red Bull teams, and because of that it looked like they were somehow similar at least in name, easy mistake. I do that all the time with slavia and sparta prague teams, I know that people who live there probably would go mad if they hear me say I mistake their team all the time lol, but I just do, it's too similar of a name. In any case, I feel like Salzburg and Leipzig would be same situation, PSG has to win that game and will win that game without a doubt.
I think that would not be a bad situation. In the end, we have to consider how PSG has to be in top 24 to make it to next stage, and right now they are not in there, they have no other choice but to win and to make sure of that they have to just destroy whoever they face, doesn't matter if it's salzburg or leipzig. Obviously this isn't a simple situation, but shouldn't be impossible to handle neither, PSG is good enough to do this at least.