Djibril Sidibe's first goal of the season helps end Lille's four-match winless run with a 2-0 victory over Montpellier.
David N'Gog scored a second-half header to give Reims a 1-0 victory over Lille as they moved up to third in Ligue 1.
Montpellier climbed off the bottom of Ligue 1 but have still not scored a goal following a 0-0 draw at Troyes, while Reims went top with a 4-1 win over Lorient.
There were wins for Marseille and Saint-Etienne in Ligue 1 on Sunday, while Lille were held to a goalless draw by Bordeaux.
PSG got their Ligue 1 title defence off to a winning start, earning a 1-0 victory over Lille after playing for more than an hour with 10 men.
Paris St Germain got their Ligue 1 title defence off to a winning start with a 1-0 win over Lille on Friday night.