Lille maintains Champions League push with win at Guingamp
The win puts Lille six points ahead of third-placed Lyon, while Nice climbed up to seventh spot.
Teen striker Rafael Leao put Lille ahead just after halftime against last-placed Guingamp. After Guingamp striker Marcus Thurm had a goal disallowed for offside following a video review, former France forward Loic Remy won and converted an injury-time penalty for Lille.
It is some turnaround from last season when Lille narrowly avoided relegation.
Lyon handed PSG its first league defeat of the campaign with a brilliant performance last weekend, but failed to get past a stubborn Nice side coached by former France and Arsenal great Patrick Vieira.
Midfielder Remi Walter's penalty midway through the second half decided a closely fought match.
Lyon is six points ahead of fourth-placed Montpellier, which has played one game less. Finishing third ensures a place in the Champions League qualifying rounds.
Monaco missed the opportunity to move clear of the French league's relegation zone after conceding an injury-time penalty in a 2-2 draw at Montpellier.
Striker Andy Delort's effort was poorly struck, with the ball squirming under the goalkeeper's body and just over the line.
A win would have moved Monaco up to 16th place, but the draw means it is 18th and in the promotion-relegation playoff spot.
Portuguese forward Gelson Martins scored his first goal since joining Monaco, sliding in at the back post to turn in a cross from the left after 14 minutes.
Striker Gaetan Laborde equalized midway through the second half, before Radamel Falcao struck in the 84th after Martins had a shot saved.
It was Falcao's ninth league goal of a difficult season that has seen coach Leonardo Jardim fired in October to make way for Thierry Henry, and then re-hired after Henry was fired last month .
Montpellier is fourth on goal difference ahead of Saint-Etienne, which lost 3-0 at Rennes. Striker M'Baye Niang, winger Hatem Ben Arfa and midfielder Adrien Hunou got the goals for eighth-placed Rennes.
On a day of mourning for Emiliano Sala , Nantes players walked onto the field dressed in black with Sala's name on their backs as the crowd chanted his name.
A minute's applause was observed at all stadiums in the top two divisions in France this weekend, in memory of the Argentine striker who was killed in a plane crash at the age of 28.