Marouane Fellaini could be ruled out for an extended period after Manchester United boss David Moyes confirmed the midfielder will undergo further scans on his troublesome back.
Fellaini has struggled with injury since United's shock home defeat to Everton on December 4. Moyes had originally expected the Belgium international to return by now, but the ongoing complaint has led to the manager requesting further medical tests.
"Fellaini has an injury to his back, which we hoped might have healed up but it hasn't," Moyes told reporters.
"I am going to get another scan and if it hasn't healed up then I might need to take the decision to get his wrist done as well. We hoped his back would be better in 10 days but he is still feeling it."
Michael Carrick, meanwhile, should return in the New Year after sustaining an Achilles injury at the beginning of last month.
"Michael has just started some work outside on the grass," said Moyes. "He is getting a little bit closer.
"He is roughly due to be back at New Year's Day time. We might be able to squeeze a few more days out of it but I couldn't be sure yet."
Information from the Press Association was used in this report.