PSG squandered a chance to take over the top 0 draw at home by Lille.
PSG entered the weekend level with Montpellier at the summit, but had a chance to take over sole possession of the top spot after Montpellier's 1-1 draw with Toulouse on Saturday.
However, the capital club failed to impress in a match that sees Lille extend its unbeaten streak to 16 games but remain two points back of the home side.
PSG's Kevin Gameiro had a good chance in the first half to put his team in front when he was played free by Javier Pastore, only to fire wide of the net.
The second half was not much better as Pastore and Nene both missed the target for the home side, while Lille began to produce a few chances of its own.
Mathieu Debuchy's header required a sharp save from PSG goalkeeper Salvatore Sirigu to keep it out, while Sirigu was needed to make another decent stop on Ireneusz Jelen to keep the match level.
Bordeaux 1, Sochaux 0
Bordeaux, France - Bordeaux's good form at home continued on Sunday as the club secured a 1-0 win over Sochaux at the Stade Chaban Dalmas.
Ludovic Sane's goal in the 22nd minute provided the difference as he played a one-two with Yoan Gouffran before finishing with a right-footed shot to help Bordeaux to its fourth successive win at home.
Sochaux has now earned one of a possible 15 points from its last five matches and sits one point above the drop zone.
Ajaccio 1, Rennes 0
Ajaccio, France - Ajaccio claimed its second win of the season on Sunday as Fousseni Diawara's goal seven minutes from time handed the hosts a 1-0 win over Rennes.
The visitors created the better chances over the course of 90 minutes but were punished in the 83rd minute when Johan Cavalli's cross was converted by Diawara, handing Rennes a defeat that keeps the club in seventh place.
Despite the win, Ajaccio is still six points from safety.