Thomas Tuchel was reportedly warned about his negative behaviour by Bayern Munich's board at a secret meeting during the recent international break.
Tuchel arrived at Bayern less than six months ago when he replaced Julian Nagelsmann, but has already tested the patience of his new bosses, particularly during the summer transfer window.
The German giants managed to sign Harry Kane from Tottenham for £100m, but Tuchel also wanted Declan Rice before he moved to Arsenal, Manchester City's Kyle Walker, and was frustrated that the club missed out on Fulham's Joao Palhinha on deadline day.