Phil Jones will have an X-ray on Thursday to assess the damage to his jaw sustained in United’s 5-0 win at Fulham on Wednesday night.
Jones required lengthy on-field treatment after he was caught by a stray Clint Dempsey elbow in the opening moments at Craven Cottage, although played on until the 20th minute when he was replaced by Ashley Young.
Early unconfirmed reports from London suggested Jones may be sidelined for up to six weeks, but Sir Alex revealed the 19-year-old would be assessed by medical staff on Thursday.
“We’ll send him for an X-ray tomorrow,” he told reporters after the game. “He had an elbow to his jaw. It was an elbow by Dempsey but I don’t think it was deliberate.”
Jones wasn’t the only injury concern at Craven Cottage. Ashley Young, who replaced Jones on 20 minutes, limped off himself after a pair of heavy challenges early in the second half.
“Fulham were very aggressive and Ashley Young has paid the price for that,” Sir Alex said. “He’ll be out for two or three weeks.”
Meanwhile, Rio Ferdinand is also expected to miss United’s next fixture, against Wigan on Boxing Day.
“Rio got a knock on the foot on Sunday against Queens Park Rangers. I think he’ll be available for Blackburn [on New Year’s Eve] but not the Wigan game,” Sir Alex said.