Metz is a good enough team. But in this match, I will place my bet in favor of Lille's victory. Lille is aiming to win the title this season. And they are playing well enough. However, to win the title, they need to win all the upcoming matches. If they lose a match, they fall behind. PSG is hungry enough for the title. If Lille makes a mistake PSG will take that opportunity very well and try to occupy the top spot in the points table.
PSG will play in parallel in the Champions League, and for him this tournament will be a priority. There are seven more games ahead and Lille have to win them all. the French championship is not easy, so it is not yet clear who will be the champion. PSG before important games of the Champions League may put up a non-main squad for championship matches, and in such games, points may be lost.