Yohan Mollo scored an 89th-minute goal to give Nancy a 2-1 win over title-chasing Paris Saint-Germain today and condemn Carlo Ancelotti to his first Ligue 1 defeat as PSG coach.
After Mohamed Sissoko had cancelled out Bakaye Traore's opener for the hosts, Mollo struck at the death to extend PSG's winless run to four games in all competitions and leave them behind Montpellier on goal difference at the summit.
Montpellier are not in action this weekend, as their trip to Marseille has been pushed back to 11 April to allow OM to focus on the second leg of their UEFA Champions League quarter-final at Bayern Munich on Tuesday.
The win lifted Nancy three places to 11th and means they have now beaten Lyon, Montpellier and PSG in the space of a month.
Following successive draws against Caen and Bordeaux, as well as a French Cup loss to Lyon, Ancelotti made several changes to his side, with captain Mamadou Sakho and top scorer Nene notably relegated to the bench. There was no immediate change to PSG's fortunes, however, as Traore gave Nancy an 18th-minute lead by gathering Mollo's square pass and poking the ball beyond Salvatore Sirigu.
Nancy captain Andre Luiz rattled the PSG crossbar with a 22-yard curler moments later, while Sirigu had to save bravely at the feet of Traore ten minutes before the interval.
The visitors drew level in the 50th minute as stand-in skipper Sissoko met Sylvain Armand's left-wing cross with an unerring downward header. PSG were transformed, with Guillaume Hoarau heading wide from Christophe Jallet's lofted centre and then drawing a fine reflex stop from Guy N'Dy Assembe following another excellent cross from Jallet.
N'Dy Assembe had to save from Jeremy Menez and Blaise Matuidi as the visitors pressed, but it was Nancy who claimed the three points when Mollo found the bottom-right corner with a low shot from 20 yards that narrowly eluded Sirigu's dive.
Nice sink Saint-Etienne
Earlier in the day, an 89th-minute strike by full-back Francois Clerc allowed Nice to snatch a 3-2 win at Saint-Etienne that prevented the home side from making ground on their rivals for European qualification.
Clerc volleyed home at the back post from Renato Civelli's flick-on, after Nice winger Anthony Mounier had equalised twice for the visitors. The defeat left Christophe Galtier's side three points behind fifth-placed Lyon in sixth place, while Nice climbed to 15th in the standings, a point above the relegation zone.
Bordeaux are four points behind Saint-Etienne in eighth after substitute Thomas Guerbert scored in injury time, barely a minute after coming on, to earn Dijon a 1-1 draw at Stade Chaban Delmas.
Bottom club Auxerre beat Valenciennes 2-0 to end a 12-game winless run and give Jean-Guy Wallemme his first victory since he replaced Laurent Fournier as coach. Auxerre are now just three points from safety, while Sochaux dragged Brest into trouble with a 2-1 home win over the Brittany side that enabled Eric Hely's team to climb to 18th and draw level on points with their vanquished opponents.
In the day's other early game, Evian tightened their grip on tenth place by winning 1-0 at Lorient. And, third-placed Lille host fourth-placed Toulouse tomorrow, while Lyon visit Rennes.