Dimitri Payet and Memphis Depay got their first goals for their new Ligue 1 clubs as both Marseille and Lyon picked up wins on Wednesday.
St Etienne moved to within a point of Ligue 1's top four with a 2-0 home victory over nine-man Lyon, as Toulouse and Nancy also won.
Yassine Benzia scored twice against his old club as Lille ran out 2-1 winners at Lyon in Ligue 1 on Saturday.
Lorient moved off the bottom of the table after a 3-1 win over Guingamp, while there were wins for Nancy and Nates.
PSG slumped to their fourth Ligue 1 defeat of the season as they were beaten 2-1 at Guingamp while Bastia continued their resurgence.
Nice returned to the top of Ligue 1 after comfortably overcoming Toulouse 3-0 at home.