Ferguson has been frustrated by the player's injury problems this season and believes he is not the dominant figure he once was.
With Real Madrid, Barcelona and AC Milan ready to spend in excess of £20m for a player who cost £7m when moving to Old Trafford four years ago, it is considered too good a deal to refuse.
Ferguson has started rebuilding his defence for next season with the signing of Fulham's Chris Smalling, while Jonny Evans is expected to play a more prominent role.
The 28-year-old Vidic has played only 18 times this season and hasn't figured at all in 2010.
Despite both he and Ferguson insisting there is no rift, his days at United look numbered.
And even though Vidic moved to quash speculation about his future, it is known that his family have struggled to settle in England.
He said: "I have never had a conflict of any kind with Sir Alex and speculation that I want to leave United is completely untrue.
"I have a contract until the summer of 2012 and intend to see it through to the very last day.
"United have made me the player I am today and there is no substance whatsoever in rumours that I have been looking for a move to either Real Madrid or AC Milan."
Vidic has looked a shadow of the player who helped United to a hat-trick of Premier League titles in his first three full seasons at the club.
Three successive red cards against Liverpool have enforced the belief that he is no longer at his peak while injury problems have forced him to sit out large parts of the campaign.
But he insists he is close to forcing his way back into Ferguson's plans.
"I will be back to my best as soon as I am picked in the starting line- up again," he said.
Should United cash in on Vidic? Have your say.
Source: Manchester Evening News
Source: M.E.N.