The Serbian defender is back in full training after suffering a knee injury against Galatasaray in the Champions League in September, and after a successful operation he is expected to start against Romanian side Cluj in Wednesday's final Champions League group game, with United having already qualified for the knock-out stages.
That has sparked speculation that Vidic may well go on to lead the Red Devils out against Manchester City on Sunday at the Etihad in the Premier League, but Sir Alex was quick to rule out that possibility.
"No, no, no, but Wednesday is a good starting point, although it depends on the lad himself," the manager told The Sun. "It will be a big bonus to have him back."
The fact that he hasn't ruled out his captain entirely though, by stating it is down to the player himself, suggests he could be involved on Sunday.
The United rearguard has been distinctly porous in Vidic's absence, notably conceding three first half goals to Premier League strugglers Reading in a 4-3 win on Saturday.
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