Radamel Falcao scored his seventh goal in the past five games as Monaco beat second-tier Ajaccio 2-1 to reach the fourth round of the Coupe de France.
GFC Ajaccio slipped back into the bottom three as Edinson Cavani blasted a hat trick to secure a 4-0 win for Paris Saint-Germain in Corsica.
Ligue 2 strugglers Sochaux produced a stunning upset to reach the Coupe de France quarterfinals with a 2-1 victory over Monaco.
Rolland Courbis made a dream start to life in charge of Rennes as their winless home run finally came to an end against in-form Gazelec Ajaccio.
Monaco slipped to third in the table despite coming back from two goals down to draw 2-2 with Ajaccio at the Stade Louis II.
Third-division side Chambly pulled off a shock 4-1 victory to knock Reims out of the Coupe de France with a hat trick from Wilfried Louisy-Daniel.