Rod Fanni has accused some of his Marseille teammates of not putting in enough effort after the club's alarming dip in form recently.
Marseille have picked up just a point from their last four league games, a run that has meant them dropping out of contention for a place in the top three, synonymous with Champions League qualification.
With the club now also seven points adrift of Saint-Etienne in fourth, which brings with it a Europa League berth for next season, the 1993 Champions League winners risk missing out on European football altogether.
Fanni, 32, told RMC the atmosphere at the club and within the squad is not as it should be.
He said: "My feeling is that everything isn't being done for things to go well. Is it mental? Are there things that I don't know about? On the pitch, we're not up to standard.
"Without going into the qualities of each individual, we have to be at our best all the time. We have to be able to look ourselves in the eye and say to ourselves that we have given everything.
"That's why I've gone off the pitch annoyed sometimes. Some people are getting themselves going and trying to do their best and others do that less."