"There are only four or five clubs that you could say to leave Manchester United to go there and it could be seen as progression.
"I know Wayne Rooney and all he wants to do is play football and win, all he wants to do is win trophies. He is a winner and there is no better club to be at than Manchester United if you are a winner. He won't want to leave unless told he can leave.
"Going abroad? There are other big clubs. For the moment, I can't see his future beyond Manchester United."
He added: "From my experience, generally the players that have left Manchester United have left before they expected to leave, before they have deteriorated or have gone down.
"Sir Alex will look at every week, every game, every season at each individual player very closely in training, very closely in games and say 'What kind of condition is he in, is he still mentally right for Manchester United?' If not, he will have no hesitation in getting rid of a player.