I hope there will be some improvement in PSG defense until their Bayern Munich matches.
Because I don't like their defending style for some weeks. They concede goals really easily against capable teams. This even leads to point losses for them in the league. Bayern Munich is a much bigger challenge for them obviously. Maybe they are very strong in offense thanks to the great trio. But they need to strengthen their defending at the same time. Otherwise they can have big problems in that matchup. Bayern Munich haven't lost much from their productivity after selling Lewandowski.
Conseder that Bayern Munich's goal productivity is really high, then of course it's only natural that you expect Christophe Galtier to be able to review and improve his team's defense. PSG are easy to concede because of their lack of anticipation in defence, but I think that's the case at the moment. Not only can PSG hope for their trio's performance to win while they are weak defensively, it must be difficult to maintain victory even if they score goals.
So far PSG have relied on Juan Bernat as left back because Nuno Mendes is still injured. It is expected that Nuno Mendes will be able to start against Bayern Munich in mid-February, and that is possibility. Marquinhos, Ramos, Nuno Mendes and Achraf Hakimi are the best defense in my opinion, but unfortunately Mendes has not recovered where he is expected to be at the end of January.