Dean Saunders will not reveal who will deputise for Ian Evatt against Scunthorpe United until he picks the team on Saturday afternoon, but admits Sam Hird is a candidate.
Centre-half Evatt is suspended, having picked up five bookings thus far this season.
However Spireites boss Saunders wasn’t making public his final decision on who would come in and take Evatt’s place alongside Charlie Raglan who has impressed of late.
“There’s an opening for someone with Evo out,” he said.
“I put Charlie in the team and he’s taken his chance. He’s played well and he’s getting better.
“Now there’s an opening for someone else.
“I’m not going to tell the opposition what we’re doing on Saturday but we’re a bit short (at the back) and Sam Hird is in the frame.”
“Sam has a good attitude, he’s got his head down, showed no signs of disappointment, but he wants to play.”
Appraising Saturday’s visitors, Saunders said Scunthorpe wouldn’t be taken lightly.
“They’re a good team and like us he’s got a lot of new players and eventually he’ll get it right, and they’ll get the consistency right.
“You win a few, lose a few, win a few and that can happen with new players.
“They’re dangerous opponents and we’ve got to be like we were on Tuesday if we want to win.
“They’ve got good forwards and can score, so we’re going to have to show a bit of respect and make sure we stop them.”
Saunders has some good players of his own, who are apparently coming into form.
Picking out some impressive performers he said: “Lee Novak has come back in and made us a better team.
“That’s eight assists and three goals for Dan Gardner.
“Sylvan Ebanks Blake and Chris Herd are showing the quality they’ve got – the only reason we’ve got them is because they’ve been injured, we would never have got them if they hadn’t had problems.
“We got them in and got them stronger.
“Mal (Purchase) has strengthened their legs and their core and kept them fit, I think the two of them are lucky they’ve bumped into Mal.”