On-loan Liverpool winger Ben Doak may have played his last game for Middlesbrough following surgery on his thigh.
Doak has returned to his parent club to undergo his rehabilitation, having last played for Boro on 25 January.
The thigh injury had seen the 19-year-old miss Boro's last six games, but he now faces a race against time to be fit, with just 11 Championship matches remaining.
"Ben's gone back to Liverpool to do some rehab at the moment so we'll see how that pans out," Middlesbrough head coach Michael Carrick told BBC Radio Tees.