Ligue 1 club Marseille have suspended head coach Michel on the eve of their Coupe de France semi-final against Sochaux.
French media have reported in recent weeks that the relationship between club president Vincent Labrune and Michel has become fragile, with Marseille on a seven-game winless run.
That dip in form has seen Marseille, who finished fourth last season, slump to 15th in Ligue 1.
A club statement read: "Given the behaviour of Michel, notably during these last three weeks, the professional sports limited company of Olympique Marseille has suspended him with immediate effect and summoned him to a preliminary interview.
Marseille have won a record 10 Coupes de France but not triumphed in the competition since 1989.