Vidic arrived home in the early hours of this morning on crutches with officials and fans fearing a serious injury.
Sir Alex Ferguson said: "I pray it is not serious, because he is such an integral part of our team.
"We think it might just be a nerve injury but we can't be sure at this moment."
One good thing about last night's win was that goalkeeper Edwin van der Saar appeared to come through unscathed.
The Dutchman's fitness had been a concern, because he has been troubled with a groin problem.
Ferguson said: "He's had one or two injuries which have given us a bit of concern, but he came through well and showed why he has 120 caps. His experience is vital.
"He made one incredible save in the second half, but we rode our luck in the first 15 minutes of the second half. You get those breaks sometimes."
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shola-shoneils, Finland (02/04/2008 at 11:16)
Please Vida we want you most.