Scholes had been expected to play some part in United's 1-1 draw with Valencia at Old Trafford on Tuesday night but, after a minor setback in training, Ferguson fears he will not be able to call upon his influential playmaker against Arsene Wenger's men.
"Paul tried training on Sunday and came off," Ferguson told MUTV. "He will be doubtful for next Monday."
The veteran midfielder has not featured since the victory over Rangers last month, when he picked up a groin injury.
Source: PA
Source: PA