David Moyes must get rid of the players that don't buy into his ethos at Old Trafford, and be ruthless in his overhaul of Manchester United's squad this summer, says Sam Allardyce.
Sky Sports reports how the West Ham manager - who welcomes the Red Devils to Upton Park in Saturday's evening kick-off in the Premier League - has advised Sir Alex Ferguson's successor not to hold back when wielding the axe, in order to stamp his own authority on the first-team.
Moyes has endured a difficult debut campaign as Manchester United boss, with the champions sitting in a lowly seventh spot in the table, 18 points off leaders Chelsea, and 12 away from the Champions League qualification places.
With captain Nemanja Vidic having already agreed a move to Inter Milan in the summer, and senior stars like Rio Ferdinand and Patrice Evra out of contract at the end of the season, a number of faces could be leaving Old Trafford, with rumours that other stars are unhappy with Moyes's managerial approach.
Allardyce suggests that the former Everton boss wipes the slate clean, and gets rid of any disruptive influences in his dressing room, keeping hold of the players that trust his tactics and man-management methods.
"He has to establish his own ideas," explained the Hammers boss. "Transition is something where you have to get your own ideas over. Then you have to find out who wants to roll with you or not.
"If they don't want to roll with you - irrespective of what they have done before - as many chief executives have said to me, 'Don't waste your time on them - get rid of them son!' Transition has to be expected."