Middlesbrough boss Michael Carrick has confirmed midfielder Ben Doak will be out for a number of weeks because of a thigh injury.
The on-loan Liverpool player missed Monday night's 3-2 home defeat by Sunderland in the Championship.
"He felt his thigh in training, and we'll have to see. It's probably a number of weeks, if anything, not days, but I don't think it'll be too long," Carrick told BBC Radio Tees.
Middlesbrough signed Doak on a season-long loan in August, and despite speculation he could be recalled in the January transfer window, he will remain at the Riverside for the remainder of the campaign.