Lens's winless streak stretched to five games when they squandered a two-goal lead in a 3-2 Ligue 1 defeat at Nantes who grabbed a last-minute winner through Moises Simon on Friday.
Franck Haise's team played their usual eye-pleasing football and were quickly in front with goals from David Pereira Da Costa and Arnaud Kalimuendo, only for Randal Kolo Muani's second-half double to cancel the advantage and Simon to finish them off.
The result left Lens, who have now picked up three points in their last five games after notably also conceding a stoppage-time goal in a 1-1 draw against Paris St Germain last weekend, in fifth place on 27 points from 18 games.
PSG lead the standings with 42 points from 17 matches while Nantes are now 10th on 25 points.
Lens got off to a brilliant start, with Pereira Da Costa firing home from close range after Massadio Haidara's cross was parried by Nantes keeper Alban Lafont into his path.
Eight minutes later, Kalimuendo doubled the advantage, sliding the ball into the empty net after dribbling past Lafont.
It was Lens's 100th shot on target this season and they became the first team to reach that tally.
Their keeper Jean-Louis Leca suffered an ankle injury after being fouled by Randal Kolo Muani and had to be replaced at halftime by Wuilker Farinez.
The Venezuela international conceded their first goal after four minutes when Kolo Muani's back deflected Ludovic Blas's fierce strike into the net.
In the 58th minute, Farinez was beaten again when Kolo Muani latched onto Willem Geubbels's cross to equalise.
Lens pushed forward in a bid to bag all three points but ended up with nothing as Simon beat Farinez with a splendid shot from just outside the area into the top corner in the 90th.