Lyon secured a Champions League place for next season after thrashing Monaco 6-1 at Parc Olympique Lyonnais.
Lyon and Monaco made it seemingly a two-horse race for second place in Ligue 1 with wins on Saturday.
Monaco missed the chance to return to second place in Ligue 1 after conceding a late goal to draw 1-1 at Rennes.
PSG ripped Caen to pieces in a 6-0 thrashing at the Parc des Princes, sending the champions 30 points clear in Ligue 1.
Marseille lost more ground in their bid to play in Europe next season as a 1-1 draw at Lorient extended their winless run in Ligue 1 to six games.
Ajaccio secured an important 1-1 draw against Bordeaux as they battle to stay in Ligue 1.