Managerless Monaco crashed to another defeat on Saturday, going down 2-0 away to Dijon the day before their former coach returns to the club to try and save them from relegation.
Leonardo Jardim will take charge again on Sunday, just three months after he was replaced by Thierry Henry who was himself sacked on Friday.
The club from the principality are in 19th place in Ligue 1 and desperately wanted points at the side immediately above them in the table.
But they were no match for a team that had won only once in their previous 17 league games.
South Korean Chang-hoon Kwon put the home side ahead after 24 minutes with his first league goal of the season and Monaco's task grew even harder after centre-back Naldo was shown a straight red on the hour mark for a bad tackle.
Naim Sliti then doubled Dijon's lead nine minutes later to seal the points.
The result takes Dijon on to 20 points, five ahead of Monaco, who are a point above bottom club Guingamp, who lost 1-0 at home to Stade de Reims.
Strasbourg, who got a 90th-minute goal to beat Bordeaux 1-0, are in fifth, while Nice, who beat Nimes 2-0, are sixth.
Paris Saint-Germain lead the table by 10 points over Lille, with three games in hand on their nearest rivals.