George Edmundson will miss tomorrow's game against Middlesbrough after rolling his ankle in Wednesday's 0-0 draw against Watford.
The centre-back returned to the team for the first time since Good Friday, partnering Cameron Burgess at the back on his ninth start of the campaign.
However, he had to be withdrawn with 79 minutes on the clock, although Kieran McKenna later revealed that he was able to walk back to the dressing room.
The manager has since confirmed that, while he won't be fit to feature against Michael Carrick's men this weekend, the knock doesn't seem to be too significant.
"George won't be involved," he said. "Thankfully it doesn't seem too serious, but he's got some swelling in the ankle, so he won't be involved.
"We've got a couple of other little issues that'll be assessed on the day of the game."
Third-choice goalkeeper Cieran Slicker is in a similar position, having suffered the same injury earlier this week. As a result, Henry Gray has been recalled from his loan spell at National League South side Chelmsford City, allowing him to step in for the former Manchester City youth player.
"He [Slicker] isn't too bad, thankfully," McKenna explained. "He rolled his ankle, so I don't think he's available for us tomorrow if needed. It doesn't look like anything too long-term.
"We always have three goalkeepers involved on a matchday anyway, we travel with three, there's always three who do the warm-up, you always need the third one to be ready.
"Cieran's done a fantastic job in that role this year, I have to say, especially on the training pitch but also on the matchdays.
"Henry's been having a good season out on loan. He's trained with us a lot anyway, and he's a goalkeeper that we like.
"He's back and been involved with us a little bit more this week. He'll be with us on Saturday."
McKenna did make four changes for Wednesday's stalemate, resting the likes of Luke Woolfenden, Massimo Luongo and Conor Chaplin, who were all brought off the bench.
If they do return to the team tomorrow, he's confident that they'll feel fresher for having a bit of a break.
"That'd be natural," the manager argued. "Anyone who didn't start on Wednesday, we'd hope that any of them who come back into the team for the following game will be fresher. That's one of the purposes of being able to rotate the team when we need.
"We know it's the last game of the busy block. We've got two weeks after this game, so the boys are in good spirits and determined to go out there, leave it all on the pitch tomorrow and see where it can take us."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here