Ghana striker Majeed Waris scored his eighth goal of the season as Nantes stunned Paris Saint-Germain 3-2 in the French Ligue 1 on Wednesday.
The defeat extends the defending Ligue 1 champions' winless streak to three games and delayed clinching another title for least another match.
Dani Alves put PSG ahead in the 19th minute with a long-range screamer but the home side equalised three minutes later on Diego Carlos' header.
Majeed Waris padded Nantes' lead minutes before halftime and Carlos added another in the 55th minute.
Metehan Guclu pulled one back for PSG in 89th minute.