MANCHESTER UNITED have been warned that Jose Mourinho would change the Reds'philosophy by former Chelsea sporting director Frank Arnesen.
Current boss Louis van Gaal has come under huge pressure this term, with United exiting the Champions League at the group stages and facing a battle to make the Premier League's top four.
Mourinho has been tipped to replace the struggling Dutchman at Old Trafford at the end of the season.
However Arnesen has warned United risk losing their identity if they appoint the Portuguese.
"Mourinho is very demanding and sometimes the players can't take it," Arnesen told Omnisport.
"He made some drastic changes [at Chelsea] and it cost him.
"What would happen if they [United] replaced Van Gaal with Mourinho? The philosophy of Manchester United will go out of the window. But maybe they are that keen to have success.
"Van Gaal could not buy all his players, but he has done tremendously well with the young kids.
"Manchester United should give him at least one year more."