Ghana striker, Abdul Nafiu Idrissu continued with his fine form for Asec Mimosa, scoring the winner for the Abidjan-based side to win the derby against perennial rivals Africa Sports.
Asec won the match 1-0 on Sunday.
Nafiu Idrissu, a member of the Olympic team and former Feyenoord Academy player scored the match winner in stoppage time.
The Ghana striker has been in fine form lately for Asec after his double in the Champions League against Morocco's Wydad Casablanca qualified Asec for the group stages.
The victory put Asec into a commanding spot early on in the Ligue 1 season, three points ahead after six matches.
They have 16 points to 13 for second placed Africa Sports, whose unbeaten record went with Sunday's defeat.
Asec and Sabe Bouna remain the only undefeated sides in the 14-team championship.