Former Manchester United No2 Rene Meulensteen says new manager Louis van Gaal faces a mammoth task turning the club around.
Meulensteen says Van Gaal must build an entire new team.
The Dutchman, who spent 12 seasons at Old Trafford under Sir Alex Ferguson, told talkSPORT: "He has to build a new team because United are still a team that can be beaten, unless proven otherwise at the start of the new Premier League season.
"It's almost like it's the end of an era at the club, with Ryan Giggs hanging up his boots and players like Ferdinand, Vidic and Evra all leaving. It's a big change for the team.
"Nobody expected what would happen under David Moyes last season and obviously United will want to leave that behind them as quickly as they can.
"Louis Van Gaal is a man with a very strong personality and a very strong philosophy.
"But not only will the players have to buy into his philosophy, people must realise the process will take time."
