Marseille jumped to second in Ligue 1 after goals by Bamba Dieng and Duje Caleta Car gave them a 2-0 victory at Strasbourg on Sunday.
Dieng and Caleta Car struck after the break to put Marseille on 32 points from 17 games, one ahead of third-placed Stade Rennais, who slumped to a 2-1 defeat at fourth-placed Nice earlier on Sunday.
Strasbourg, who had won their two previous league games, scoring eight goals in the process, are seventh on 26 points from 18 matches.
Leaders Paris St Germain, who have 42 points from 17 games, host Monaco later on Sunday.
At La Meinau, Marseille were in control from the start but failed to break the deadlock in the first half, with Strasbourg's Habib Diallo being denied an opener when he was ruled offside in the 13th minute.
Everything clicked in the second half for the visitors, however.
Dieng put Jorge Sampaoli's side in front in the 62nd minute with a spectacular bicycle kick from inside the area.
Ludovic Ajorque had a chance to level but Pau Lopez blocked his attempt to keep Marseille ahead.
Marseille effectively wrapped it up eight minutes from time when Caleta Car beat Matz Sels with a downward header from Dimitri Payet's corner kick.