A review of the weekend's action in the French Ligue 1.
Marseille made a horror start to 2013 as their Ligue 1 title bid suffered a shock blow with a 3-1 defeat at 10-man Sochaux.
OM returned from the winter break level at the top with Paris St Germain and Lyon but are adrift of both after a forgettable night in the snow in Montbeliard.
First-half goals from Sloan Privat and Cedric Bakambu stunned the visitors before a Jeremy Morel own goal shortly after half-time handed Sochaux full control.
Their grip loosened when Jordan Ayew quickly replied and then Joseph Lopy saw red on the hour.
But Marseille failed to make any further inroads with Lucas Mendes' header against the post with the final touch the closest they came.
Lyon took full advantage of an opportunity to go two points clear at the top with a 2-1 win over Troyes at the Stade de L'Aube, leaving the hosts six points adrift of safety with only one win in 11 matches.
Following PSG's slip-up at home to Ajaccio on Friday evening, Les Gones had youth-team products Maxime Gonalons and Samuel Umtiti to thank for the goals that took them three points clear of Marseille and ahead of the Parisians.
Yoan Gouffran and Henri Saivet scored the goals as Bordeaux stopped Rennes making it three Ligue 1 wins on the trot and drew level with their opponents in the table.
Rennes went into the game in fourth place and looking to close the gap on the top three but Bordeaux had other ideas and recorded their first win since mid-November after previously scoring just three goals in six league games.
QPR manager Harry Redknapp was in the crowd to reportedly watch Rennes' Yann M'Vila but he did not have the best of nights, making the mistake which led to the opening goal.
Managerless Nancy came from behind twice to earn an impressive 2-2 draw against Lille.
Ligue 1's basement club went into the game winless in the league since the season's opening day and having been rocked by the resignation of coach Jean Fernandez.
Head of youth Patrick Gabriel stepped in as caretaker but had just one training session with the team, and saw his charges fall behind after only a minute to Nolan Roux's goal.
But Romain Grange equalised and, after Dimitri Payet restored Lille's lead, Thomas Ayasse volleyed a second leveller.
The draw leaves Lille with only two wins in eight games, denting their European ambitions, while Nancy are now seven points adrift of safety after a seventh draw in eight league games.
Gaetan Charbonnier's late double lifted Montpellier to their fourth straight home win with a 2-0 triumph over Lorient.
Charbonnier struck 11 minutes from time and again at the death to condemn Lorient to a first defeat in six on their return from the winter break.
The win takes Montpellier into eighth, two points behind Lorient who drop to sixth.
Struggling Evian had goalkeeper Bertrand Laquait sent off early on as they slipped to a third straight Ligue 1 defeat at home to Brest.
The hosts were reduced to 10 men after just 14 minutes when Laquait conceded a penalty for bringing down Eden Ben Basat when through on goal.
Ben Basat took the spot-kick himself, beating replacement keeper Stephan Andersen.
Evian did well to stay in the game despite being a man down, and indeed only some smart saves from Alexis Thebaux kept them from levelling, but Bruno Grougi added a second at the death to seal Brest's win.
Paris St Germain used their day's head start to edge one point clear at the top of Ligue 1 but will not expect to stay there after being held to a goalless draw by lowly AC Ajaccio on Friday night.
Little went to plan for the capital club in their first match back from the winter break as Thiago Motta was sent off late in the first half, Thiago Silva went off injured and Lucas Moura had his debut cut short in the final 10 minutes after suffering cramps.
And amid all of that, a fixture that had produced 11 goals in the previous two encounters ended goalless to leave PSG at the mercy of Lyon and Marseille, one point behind ahead of their respective fixtures over the weekend.
Carlo Ancelotti was visibly frustrated on the sidelines as his side produced endless chances, even after being reduced to 10 men, but failed to convert them against a team only four points above the drop zone.
The mid-table clash between St Etienne and Toulouse finished all-square at the Stade Geoffroy-Guichard.
St Etienne went ahead through Loic Perrin after 25 minutes but the lead lasted just two minutes before Etienne Didot equalised.
Serge Aurier put the visitors 2-1 up four minutes before the break only for Yohan Mollo to draw St Etienne level with a little under half an hour remaining.
The result means stumbling St Etienne have now taken just three points from six games with their last win coming on November 23 against Valenciennes.