Mario Balotelli's third red card of the season was down to using insulting English language, says the referee who dismissed him.
Nice's title hopes suffered another blow with more dropped points in a 2-2 draw at Rennes.
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.
Radamel Falcao scored two second-half goals as Monaco moved three points clear in Ligue 1 with a 3-0 victory at home to Nice.
Southampton have taken Nice goalkeeper Mouez Hassen on loan.
Southampton are close to completing the signing of Mouez Hassen - the Nice goalkeeper - Sky sources understand.