Ferguson will now assess his troops ahead of Wednesday's FA Cup third-round replay with West Ham at Old Trafford.
"Jonny Evans felt his hamstring yesterday afternoon," he informed MUTV. "I was at Nottingham [watching Forest v Peterborough] and got a message at half-time. He trained in the morning so it was strange. But Vidic and Ferdinand are experienced and you can't say any more than that. They were brilliant."