The central defender is worried that the club could live to rue the Serbian's departure and says that he will not decide on his own future until their next manager is confirmedManchester United defender Rio Ferdinand fears that the club could be made to lament Nemanja Vidic's departure just as they did following Jaap Stam's exit in 2001.
Vidic, 32, will join Inter in the summer after opting not to renew his contract and Ferdinand has compared the situation to that of the Dutchman - of whom Sir Alex Ferguson later admitted that "in playing terms, it was a mistake" to let him go at the age of 29.
Stam was sold to Lazio for £16.5 million in the summer of 2001 and went on to play at the top level with various clubs for another six years.
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The 35-year-old could joining Vidic in leaving Old Trafford this summer with his contract also due to expire. The former England captain was coy on his future, insisting that no decision will be made until David Moyes's long-term successor - who will be Netherlands coach Louis van Gaal - has been confirmed.
"I'm fit, I'm healthy and I want to continue playing," Ferdinand added. "I've spoken to a lot of mates of mine in the game and they all say the same thing - keep playing for as long as you can. I want to do that.
"The club at the moment is in a position where they can't really make any decisions about anything. For me to be saying that I want to do this or that is irrelevant. We've got to see who becomes the new manager and boxes will be ticked from there.
"I just want the best solution for the club. Whatever it is, I'll respect it and, after that, I'm open to offers. I'd rather wait and see what happens at United and then there'll be a decision made."