Paris Saint-Germain's defensive shortcomings were exposed as Monaco snapped the champions' Ligue 1 winning streak in a thrilling 3-3 draw at the Parc des Princes on Sunday.
The result left PSG on 46 points from 19 games, five ahead of second-placed Olympique de Marseille, who have played a game more. Monaco are eighth on 29 points having also played 19 games.
PSG, who had won their six previous league games, and Monaco will play again at the Louis II stadium on Wednesday.
Nantes climbed up to fourth on 32 points thanks to a 2-0 win at St Etienne.