Ben Brereton will undergo a scan to determine the extent of the damage to his knee after being forced off injured in the win over Millwall.

The attacker, the only player to start every game this season, was replaced just before the hour after writhing in agony following a challenge from Shaun Hutchinson.

Brereton was able to hobble off the pitch, after several minutes of treatment, and will now be assessed by the club’s medical team.

Tony Mowbray said: “He’s got a swollen knee at the moment, looks like the lateral side of his knee, so he’ll get it scanned.

“I think as the tackle came in he got his foot stuck and the weight came across it and it’s swollen on the outside of his knee.

“That would suggest lateral ligament but we’ll see.

“He is walking on it which is good sign, but we’ll wait and see.”

Scott Wharton missed the game owing to the concussion protocol after coming off following a clash of heads in the weekend win over Barnsley.

That handed Daniel Ayala, who has been out with a groin problem, his first start since October 21, with Amari’i Bell coming in at left back as Barry Douglas was ruled out with the muscle injury that saw him replaced early on against Barnsley.

Bradley Johnson played despite suffering with a sore back of late, while Joe Rothwell was only on the bench after complaining of tightness in his hamstrings.

“Joe Rothwell has been complaining to me for two days that his hamstrings are screaming,” Mowbray said.

“We can’t afford to lose players like Joe Rothwell.

“Bradley Johnson has had a sore back, Rothwell sore hamstring and thighs, what do you do? Do you keep playing them and see your main players drop off one by one?

“You have to trust your players in your squad, I’ve said that Dolan will have to come in and start some games, so is Trybull, so is Buckley, they all are, Stewy Downing was back on the pitch tonight.

“Our squad is getting stretched and we’re going to have to see how far we go with it.”