Ronny Rodelin's fifth goal of the season helped Caen move out of the Ligue 1 relegation zone after a 1-0 win against Nancy on Tuesday.
Rodelin finished confidently in the 24th minute, collecting a long throw-in, skipping past Modou Diagne and placing the ball through the legs of Belarus goalkeeper Sergey Chernik.
Nancy's hopes of equalising took a blow when 18-year-old defender Faitout Maouassa received a second yellow card and was sent off in the 78th minute for fouling Rodelin, whose free kick was saved by Chernik.
The win ended a run of three straight defeats without scoring for Normandy-based Caen, who moved up to 15th place.
But Nancy dropped into 18th spot after losing their fourth straight game without scoring.