Paris Saint-Germain suffered their first Ligue 1 defeat since the opening round of the season on Sunday, going down 1-0 at home to Nancy.
Antoine Kombouare’s expensively assembled squad had recorded six league victories in succession prior to a 1-1 draw at Bordeaux last week.
And they were unbeaten in 12 Ligue 1 matches going into Sunday’s late kick-off at the Parc de Princes.
But Jean Calve’s 49th-minute strike secured an improbable win for struggling Nancy, and means PSG have now picked up just one point from a possible six.
They continue to top the standings, but are level on points with second-placed Montpellier and retain the lead on goal difference only.
After going winless in their first 10 matches, Nancy have now managed three victories in their last four outings, and climb to 16th on the table.
Elsewhere, Valenciennes came from behind to win 2-1 at home to Auxerre.
The visitors led through Alain Traore’s 34th-minute strike at the Stade du Hainaut.
But Isimat Mirin levelled a minute before the hour mark, before Mamadou Samassa bagged the winner for the home side with 12 minutes remaining.
It was Valenciennes’ third win of the season, taking them up to 15th place.
And on a good day for the league’s struggling teams, Brest recorded just their second victory of the season with a 2-0 win at home to Sochaux.
Bruno Grougi broke the deadlock from the penalty spot in the 67th minute at the Stade Francis-Le Ble, with Sochaux defender Mathieu Peybernes sent off for bringing down Eden Ben Basat inside the box.
Substitute Romain Poyet made sure of the points when he volleyed home with 10 minutes to go, capping off a good move from Nolan Roux.