Ferdinand's calf injury is expected to clear in time to face Marseille in the Champions League in 10 days' time, with Ferguson insisting that the problem is not due to a recurrence of previous back problems.
He said: "It could have happened to anyone. It's nothing to do with his back. That was our main concern.
"It'll just be a couple of weeks out, but you have to remember he's been in first-team football since he was 17 years old. That's a long time so he'll pick up little strains like a lot of players do. I'm sure this isn't a long-term thing."