Marseille president Vincent Labrune on Wednesday said that team coach Didier Deschamps had his "total support", despite the club's French Cup quarter-final defeat to part-timers Quevilly.
Labrune told AFP that he would talk to players on Friday in a meeting scheduled even before the 3-2 extra-time defeat to the third-tier minnows on Tuesday.
But he added: "Everyone has to face up to his responsibilities. There's one thing that we can't comprise on, that's respect for the Marseille jersey."
The defeat is the latest setback for the French giants, who despite qualifying for the quarter-finals of the Champions League with victory over Inter Milan are struggling in Ligue 1.
Relegation-threatened Dijon on Saturday dented Marseille's hopes of European football next season with a shock 2-1 win, consigning them to a fifth, straight defeat and leaving them ninth in the league.
"The priority now is to show another side in the championship and to give our all to finish as high as possible," said Labrune, adding that "the only consolation after this French Cup defeat was that the fixture list will be less hectic".
To prepare for their Champions League quarter-final against Bayern Munich, Marseille have asked for their March 31 league match against Montpellier to be put back to April 3.
French league officials are expected to give their decision on the request on Thursday.