Remi Garde's men shot down the champions with a gritty 1-0 win whilst elsewhere, Sochaux denied Bordeaux with a late goal, as Lille's poor form continued
Saint-Etienne's bid to top the Ligue 1 table for at least 24 hours on Friday evening ended in failure as they were surprisingly held to a 0-0 draw by Ajaccio.
The visitors, who had been free-scoring in the league up until this point, were rather limited in attack with the absence of Pierre-Emerick Aubameyang, as Max Gradel and Brandao saw efforts denied by Guillermo Ochoa.
Christophe Galtier's men were still on a high after eliminating Paris Saint-Germain from the Coupe de la Ligue but they were largely frustrated by a well-drilled Ajaccio defence.
It could've been better for Alex Dupont's men who spurned a brilliant chance late on by Frederic Sammaritano as they were forced to make do with just a point, though, Saint-Etienne are now unbeaten in 13 matches in all competitions.
OLYMPIQUE LYONNAIS 1-0 MONTPELLIER
Lyon improved on their brilliant week which saw them beat Olympique de Marseille 4-1, by narrowly securing a 1-0 win over champions Montpellier.
Bafetimbi Gomis struck the game's only goal with his fourth strike in less than a week following his hat-trick at Stade Velodrome, as his powerful effort from Clement Grenier's inch-perfect pass evaded the reach of third-choice goalkeeper Jonathan Ligali.
Steed Malbranque saw an effort fly painfully wide of the goal, though at the other end, Marco Estrada was twice denied by resurgent Lyon goalkeeper Remy Vercoutre.
Souleymane Camara would also be thwarted, as the champions suffered yet another defeat, leaving them to languish just two points ahead of the relegation zone.
BORDEAUX 2-2 SOCHAUX
Bordeaux missed out on prospective second place on Saturday, as they were frustratingly held to a 2-2 draw thanks to a late show by Sochaux at Stade Cheban-Delmas.
Loic Poujol put Eric Hely's men ahead after the half-hour, becoming the first side to take the lead away to Bordeaux this season.
Seven minutes later, it was all square as Jerome Roussillon unfortunately put through his own net, before Yann Gouffran turned the match in favour of the hosts.
The visitors were full of heart nonetheless, and they were rewarded with minutes left, as Rafael Dias popped up to bag a point with his first Ligue 1 goal.
EVIAN TG 1-1 AS NANCY-LORRAINE
Nancy's 14th match without a win saw them stumble to a 1-1 draw with Evian at Parc des Sports in Annecy.
Pascal Dupraz's men edged out their opponents in a fiercely competitive opening few minutes, as they finally took the lead just before half-time.
Brice Dja Dje-Dje's stunning opener saw him power home from 25 yards, leaving Guy N'Dy Assembe embarrassed in the opposing goal.
The visitors rallied however, after falling behind, and finally equalised soon after the break as Jordan Loties' cross was turned in by Yohan Mollo as the points were ultimately shared.
LOSC LILLE METROPOLE 0-0 SC BASTIA
Lille lost further ground on the chasing pack as they slumped to 10th place in Ligue 1 following a dour 0-0 draw at Grand Stade Lille Metropole.
Rudi Garcia's men comfortably beat the Corsican side in the Coupe de la Ligue earlier this week, but Frederic Hantz's men were equal to les Dogues this time around.
Salomon Kalou engineered a good attacking opportunity in the pick of the action, though Nolan Roux and later, more glaringly Dimitri Payet could not deny a resolute Bastia defence.
Lille host Valencia in the Champions League in midweek, as they seek an unlikely place in the Europa League.
VALENCIENNES 1-0 STADE DE REIMS
Valenciennes re-ignited their push for a top-five place as they moved to within a point of Paris Saint-Germain with a nervy 1-0 victory over Reims.
The match-winner came after six minutes as Gaetan Bong's fine cross for Foued Kadir was neatly finished off by the Algeria international, as he powered low under Kossi Agassa.
Reims were not up to the task at Stade du Hainaut, as they could not find away past a stubborn defence and Nicolas Penneteau, whilst at the other end, Mathieu Dossevi rattled the woodwork.
Nicolas Fauverge's header, which was just wide of the post, was all that Reims could muster, as their promising early season form has all but been extinguished with yet another defeat.
STADE BREST 1-2 OLYMPIQUE DE MARSEILLE
Marseille rebounded from their shock 4-1 thrashing at the hands of Lyon on Wednesday, as they became the first team to win at Stade Francis La-Ble this season, thanks to a 2-1 victory over Brest.
Elie Baup's men were by far the better side in the early stages in a scrappy encounter, affected by the fleeting rain and fog. The returning Morgan Amalfitano came close, before Joey Barton and Mathieu Valbuena tested Alexis Thebaux with efforts.
The deadlock was broken just after the half-hour when Barton set up Souleymane Diawara, who fired past Thebaux. Nine minutes later, Charlison Benschop equalised against the run of play, with a towering header from a corner.
Andre Ayew restored the visitors' lead, again thanks to Barton's fine attacking work - as the Englishman recorded his first assist in football for a year, as well as his first double assist in a single game in his entire career.
Late on, however, Benoit Lesoimier's fine effort almost crept into the top corner, but for a fine save by Steve Mandanda, ensuring OM moved to second place.
ESTAC TROYES 2-3 STADE RENNAIS
Rennes' recent upturn in fortunes continued as they secured a stunning 3-2 comeback victory over relegation-threatened Troyes, who had previously led 2-0.
The hosts took the lead through Benjamin Nivet, whose header beat Benoit Costil in the Rennes goal. Stephane Darbion added a second, converting in from Jean Christophe Bahebeck's cross, enabling Troyes fans to start dreaming of what would only be a second league win.
Romain Alessandrini's superb free-kick reduced the deficit after the break to give them a fighting chance before Julian Feret's fine finish saw the scoreline pegged back to 2-2 with minutes to go.
Frederic Antoinetti's side's comeback was complete with Jonathan Pitropia firing in with a minute left to compound the misery on the promoted side, who later saw Corentin Jean sent off.
FC LORIENT 1-0 TOULOUSE FC
Toulouse suffered a fourth defeat in five Ligue 1 encounters as Lorient picked up a morale-boosting 1-0 win in the weekend's final game on Sunday evening.
Benjamin Corgnet got the goal on the brink of half-time as Christian Gourcuff's men handed a demoralising defeat to Alain Casanova's fledgling side.
The result means Toulouse drift nine points behind leaders Lyon, as they missed the chance to go within a point of Paris Saint-Germain in an increasingly tight top half of the table.
Meanwhile, Lorient secured what was only their fifth league win of the season, and their second since September.