Former Manchester United defender Paul Parker believes that Nemanja Vidic would not be leaving Old Trafford if Sir Alex Ferguson was still manager, reports talkSPORT.
After confirmation from the Serbian defender on Thursday that he'll not be extending his contract, and will depart the reigning Premier League champions at the end of the season, Parker says that Ferguson's retirement has certainly played a factor in the Red Devils captain's impending exit.
"Yes. It would be [different] but that's football, that's players, you play under certain managers," he said. "I found it very difficult when I left Manchester United to go play anywhere else.
"Suddenly you haven't got that person who drove you there, that person you respected and you're willing to do everything to go and play for them.
"You just can't do it, it's a footballer's mentality, it's human nature and it's only after when you realise that you should have done that [played for another boss]."
Vidic has been one of the most consistent centre-backs in the Premier League, since joining Manchester United from Spartak Moscow in a £7million deal in January 2006.
The towering stopper has amassed 15 trophies during the past eight years in England, and his departure will be a massive blow for David Moyes, in what is already turning out to be a difficult debut season at Old Trafford.
"Vidic gives Manchester United a presence," Parker continued. "Anybody playing up against Manchester United and they see Vidic in the backline, they think 'oh this is going to be tougher than we thought'.
"Other players will work around him and go in there to protect him because they know they need him to play, to organise. That's what players look for and if that person's not there it makes it difficult for those players to mentally feel they can go win the game.
"Vidic will be missed at Manchester United because for Manchester United he's the last of a dying breed."
With question marks also surrounding the long-term future of Rio Ferdinand, Moyes might be forced into the transfer market in the summer, or alternatively give chance to the likes of Jonny Evans, Phil Jones and Chris Smalling to fully establish themselves in the first-team.