Manchester United's senior players are struggling to accept the change of manager this season.
The Daily Mail says there is a feeling among key figures that some older players have been unable to accept change.
Of the 31 members of the senior squad, 18 have been at the club for more than three years; 14 of those more than five.
Sir Alex Ferguson's departure was seen by some not simply as the end of an era but the end of their careers, and the sudden drop in performance levels has reflected that.
