Exactly this match won't be difficult or even any hard for PSG.
There will be several follow-up matches held by the French League tomorrow. One of them is PSG against Lorient. From this match, PSG should not experience any difficulties, not even the slightest. After looking at the track record of their opposing club, PSG should have won by a landslide and not even let Lorient score a single goal. Are they biased? because so far, Lorient has really experienced quite high difficulties against other clubs too. So PSG won't have a difficult match, that's all, it's not meant to be underestimated.
In the other hand, Marseille vs Nice may be quite interesting. Marseille is not a top club, but they are able to compete very well in UEFA Europe League. So, this will be quite tough match to Nice. In fact, both Nice and Marseille are looking at a pretty bad few weeks. Especially Marseille, it's really bad to see their track record in the last 5 matches. That's really bad. So, in this match, they have to work very optimally.
Lorient will be the next opponent for PSG and as you said of course the match will not potentially make PSG lose points later, currently PSG are at the top of the table while Lorient is still in the 17th relegation zone at the moment, so we can compare the strength and also the performance of the two teams that are very different at this time, Although Lorient will play at home but still there is no chance for us to see Lorient can beat PSG in the match although most likely PSG will play their reserve squad in the match later, currently PSG is in quite good form and even in high motivation after successfully eliminating Barcelona in the Champions League, besides of course PSG will still aim for victory in order to be able to win the Ligue 1 title sooner this season.
Against Nice will be a match that we can say as an opportunity for Marseille to be able to rise to a better ranking, a victory from Nice can at least return Marseille to rank 7 later, Marseille's performance is not very good in Ligue 1 at this time but in the European League they are quite surprising we can enter the semi-finals to play Atlanta in the next match, Against Nice is certainly not an easy match for Marseille but it looks like Marseille will be able to at least get 1 point in the match later.