Mario Balotelli revealed on social media that he was racially abused by Bastia fans while playing for Nice on Friday.
Nice's stuttering form continued as they were held to a 1-1 draw by lowly Bastia in Ligue 1 on Friday.
Lorient moved off the bottom of the table after a 3-1 win over Guingamp, while there were wins for Nancy and Nates.
Julian Draxler scored on his PSG debut as the defending Coupe de France champions beat Bastia 7-0 to advance to the last 32.
PSG slumped to their fourth Ligue 1 defeat of the season as they were beaten 2-1 at Guingamp while Bastia continued their resurgence.
Saturday's game at Metz was abandoned after fans threw firecrackers at Lyon's goalkeeper, while PSG lost 3-0 at Montpellier.
PSG moved joint-top of Ligue 1 after goals from Angel Di Maria and Jese Rodriguez helped them to a 2-0 win over Nantes.
Monaco trimmed Nice's lead at the top of Ligue 1 to three points as Leonardo Jardim's side thrashed Nancy 6-0.
Monaco missed the chance to close the gap on Ligue 1 leaders Nice while Alexandre Lacazette scored twice for Lyon.
Lyon's alarming slump in form continued on Saturday as they lost 3-1 at home to Guingamp.
Paris Saint-Germain claimed a share of second place in Ligue 1 with a 2-1 win at Nancy.
Monaco thrashed 10-man Metz 7-0, while there were wins for Lille, Caen, Nantes and PSG in Ligue 1 on Saturday.
Monaco moved to the top of Ligue 1 after coming from behind to beat Angers 2-1 while Lyon were upset by Lorient.
Mario Balotelli scored twice as Nice beat Monaco 4-0 to go top of Ligue 1, while there were also wins for Lyon and Bordeaux.
Lyon missed the chance to climb up to third in Ligue 1 after they were held to a goalless draw against Marseille.
Monaco returned to the top of the Ligue 1 table thanks to a thumping 4-1 win in Lille on Saturday.
Alexandre Lacazette was forced off with a knee injury as Lyon slipped up to Dijon, while Nice were held by Lille.
Gabriel Boschilia's strike gave Monaco a 1-0 win at Nantes on Saturday.
Bordeaux beat Saint-Etienne, while newly-promoted Metz came from behind to beat Lille. Get the latest from Ligue 1...
Lyon secured a Champions League place for next season after thrashing Monaco 6-1 at Parc Olympique Lyonnais.