Ferguson meanwhile allayed fears over the future of striker Michael Owen by saying he could be fit for Wednesday's UEFA Champions League trip to Marseille. A groin injury, suffered in training, will keep him out of the Crawley tie but not for the rest of the season as had been first feared.
"He picked up a small injury that will force him out of tomorrow. I was keen to play him," Ferguson said. "We could risk him, but there's no point to that, and he should be OK for Wednesday."
Owen's absence should not hamper United too much, particularly with the attacking strength in depth at the club and the return to training of Antonio Valencia, who broke his ankle in September.