Tony Pulis has confirmed that Dael Fry will miss out on Saturday's match against Blackburn Rovers (kick-off 3pm) but says another of his defenders is back in contention.
Fry was withdrawn in last Saturday's match against Aston Villa after a clash of heads with Yannick Bolasie, bringing a premature end to a run of six successive games in Boro's starting XI.
And while the England youth international won't recover in time for the weekend, Ryan Shotton could yet feature after returning to full training following a knee injury.
"Dael won't be involved tomorrow but we're hoping he'll be fit for the QPR game.
"Ryan's trained nearly three weeks with us now, we've just been trying to get him up to a certain level."