Lens clawed to within a point of Ligue 1 leaders Paris Saint-Germain on Sunday after beating bottom side Metz 3-0 to relaunch their unexpected title challenge.
Saudi international Saud Abdulhamid drilled in the opening goal late in the first half and Florian Thauvin doubled the lead for Lens immediately after the break.
Amadou Haidara wrapped up the victory on 52 minutes as Lens won for the first time in three matches to relaunch their pursuit of PSG, who lost 3-1 at home to Monaco on Friday.
"There are still a few hills to climb but being within a point of PSG with nine games to go is a good thing in itself," AFP quoted Lens coach Pierre Sage as saying
Metz, who beat Lens earlier in the season, stayed rooted to the foot of the table. They have not won in the league since November, taking only two points from their last 13 matches.
Recently fired coach Franck Haise had a triumphant return to south coast side Nice on Sunday.
Under new coach Claude Puel, Nice continued their slump towards the relegation zone as they were thumped 4-0 at home by Haise's resurgent Rennes, the Brittany club climbing above Lille to fourth.
Lille drew 1-1 with Lorient, while Brest put two goals past Le Havre without reply.
On Saturday, Marseille avenged their midweek French Cup elimination by Toulouse, as Mason Greenwood scored the only goal in a 1-0 league win.
Lyon can reclaim third place from Marseille later on Sunday with a win over Paris FC.
