Spireites goalkeeper Aaron Chapman has received a further injury setback and will now require surgery on his right ankle.
The injury occurred sometime after the match with Peterborough United on Saturday, with the 'keeper waking up on Sunday and realising he'd sustained the injury.
Rodger Wylde, head of sports science and medicine reported on Chapman's injury and what the plan is now for the Spireites 'keeper.
"We don't know when it occurred," said Wylde. "He's had a spontaneous bleed in his ankle which he found when he woke up on Sunday morning - after training but not playing on Saturday.
"It has now resulted in Aaron needing to have reconstruction of his ankle, which is the same procedure he needed earlier this season with the other ankle."
Chapman has a genetic condition which means he was born with his ankle ligaments having only 20% of the strength they should.
After sustaining the same injury while on loan with Accrington Stanley, surgery on his left ankle took place before the new year and the surgery now required on his second ankle should lead to the problems being fully repaired.
Once the surgery is completed Chapman is expected to need 16 weeks of rehabilitation before he is ready to play again.
Wylde continued: "We thought he would have to have this surgery done at some point, but we decided only a couple of weeks ago that we were going to have it done later on.
"We're just preparing him now for his new operation date, but we need to wait for the swelling to go down first."