Reims and Rennes have lost ground in the race for European qualification, losing to Strasbourg and Tolouse respectively as Ligue 1 enters its final stretch.
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Seventh-placed Reims - four points off Nice in fifth, the final qualifying spot - fell at Strasbourg 3-1 while Rennes stayed ninth after a 2-1 loss at home to Toulouse.
Both sides have five games left.
Reims led early through Japan forward Keito Nakamura, before Kevin Gameiro equalised from the penalty spot just before halftime.
Defender Abakar Sylla netted shortly after the break and substitute Moise Sahi scored an injury-time third for Patrick Vieira's side.
In Rennes, Desire Doue's angled shot put the home side ahead after 20 minutes, but Venezuela midfielder Cristian Casseres equalised within two minutes and Mali defender Moussa Diarra gave Toulouse a lead they never relinquished 10 minutes later.
A few hours before the match, a violent street battle took place between 150-200 supporters from each side, resulting in numerous minor injuries.
Rennes and Toulouse have a longstanding fan rivalry.
There have been numerous incidents of fan violence in France this season, from street clashes to the buses of visiting fans being pelted with objects after games.
Second-placed Brest can trim Paris Saint-Germain's lead to seven points by winning at Lyon on Sunday (Monday AEST).
Australian Associated Press
