Lucas Ocampos' tap-in guided Monaco to a 1-0 Champions League victory at Bayer Leverkusen to blow Group C wide open.
Monaco needed a 75th-minute equaliser from Joao Moutinho to snatch a 2-2 draw at home to struggling Caen on Saturday.
Paris Saint-Germain closed the gap to Ligue 1 leaders Marseille to a single point after claiming a 2-0 win.
Ricky van Wolfswinkel rescued a point as St Etienne struck back for a 1-1 draw against 10-man Monaco.
Talisca scored a valuable goal to give Benfica their first win in Champions League Group C with a 1-0 win over Monaco.
Monaco missed the chance to return to the top four after Benjamin Moukandjo scored a late equaliser for Reims.
Live only on