Zlatan Ibrahimovic became PSG's record goalscorer with a penalty double as Marseille were defeated 2-1.
Napoli made it three wins out of three for Italian sides in the Europa League on Thursday night with a 2-0 victory at Legia Warsaw.
Hatem Ben Arfa scored twice, including a superb solo effort, as 10-man Nice ended St Etienne's five-match winning run.
Marseille have been punished for crowd trouble last weekend with a partial closure of their stadium for at least three weeks.
Aldo Kalulu scored his first ever Ligue 1 goal as Lyon secured their first home win of the season with a 2-0 victory over 10-man Bastia.
Marseille came from behind to draw 1-1 against Lyon in a game that was suspended for 20 minutes due to crowd trouble.