Thanks to a goal from Hamel, the Parisians are back in control of the championship, one point ahead of Dunkirk and Lorient, which hosts Metz in the evening.
At the opposite ends of the rankings, Caen and Ajaccio find themselves in great difficulty, weighed down by a fourth consecutive setback.
Stade Malherbe suffered the law of Grenoble in a heated match with three expulsions (0-1). The ACA for its part lost the Corsican derby in Bastia (4-0), reduced to ten just before the break.