Montpellier, Lille, Lyon and Marseille all won on Saturday to put pressure on Bordeaux at the top of Ligue 1.
Second-placed Montpellier edged out bottom side Grenoble 1-0 after Victor Hugo Montano got the only goal of the game in the 27th minute.
The home side dominated the match from the early stages and broke the deadlock when Montano got on the end of Souleymane Camara's cross to send a bullet header into the net.
Montpellier's defence then stood firm for a fourth consecutive match - moving them to within one clean sheet of the club record.
The win moved Montpellier up to 48 points, level with reigning champions Bordeaux, who do not play St Etienne until Sunday night.
Third-placed Lille kept up the pressure on the top two with a 3-1 victory over relegation-threatened Boulogne.
It was their 11th successive win at the Stade Metropole, with all the goals coming in the first half.
Ludovic Obraniak struck twice, with Adil Rami grabbing Lille's second as Rudi Garcia's side closed to within four points of the top.
Olubayo Adefimi scored Boulogne's only goal, with the result leaving them seven points adrift of safety.
Fourth-placed Lyon also won, beating Lens 1-0 thanks to a goal from Cesar Delgado.
After climbing off the substitutes' bench in the 68th minute, Delgado netted the winner six minutes later with a right-footed effort into the bottom corner.
An 88th-minute own goal allowed fifth-placed Marseille to stay in touch with the Ligue 1 leaders as they beat in-form Monaco 2-1 at Stade Louis II.
The visitors went ahead after 37 minutes when leading scorer Mamadou Niang converted from the penalty spot only for Moussa Maazou to cancel out the goal three minutes later.
Monaco midfielder Alejandro Alonso was sent off near the end before defender Nicolas Nkoulou was left ruing his luck as he unwittingly turned in Mathieu Valbuena's late shot to hand OM a victory that moved them six points off the summit.
Filip Sebo netted in injury time to give mid-table Valenciennes a last-gasp 2-1 victory over strugglers Nice.
After failing to break through in the first half, Rudy Mater opened the scoring for the hosts in the 50th minute only for Nice to equalise with their first chance of the night thanks to Loic Remy.
It looked like that would be enough for the visitors to earn a precious point but it was not to be as Sebo sidefooted home at the death.
Paris St Germain eased the pressure on coach Antoine Kombouare as they ended a four-game losing streak with a hard-fought point on the road at Nancy.
Damian Macaluso went closest to settling the result in Nancy's favour but he contrived to miss an open goal in the second half.
The point moves PSG onto 30 points, 13 above the drop zone, while Nancy are two points better off after their fifth stalemate of the campaign.
Le Mans remain in the drop zone after failing to take advantage of Sochaux having to play with 10 men for the entire second half as their clash ended goalless.
The visitors were reduced to 10 men in the final minute of the first half when Loic Pujol was sent off for a dangerous tackle from behind on Mathieu Dossevi and they held out against Arnaud Cormier's side.