Chesterfield forward Dan Gardner is set to see a specialist to determine the extent of the ankle injury he suffered against Accrington Stanley.
Gardner had to be withdrawn shortly before half-time on Saturday after he was on the receiving end of a challenge from Peter Murphy which resulted in the Stanley midfielder being sent off for a second yellow card offence, although television replays suggest there could have been few complaints if referee Scott Mathieson had shown him a straight red card.
An initial scan has shown no fracture to the bone but the 23-year-old's left ankle is badly swollen.
He will see a specialist in Manchester on Tuesday who will be able to give Spireites boss Paul Cook an idea of how long he could be without his player.
When asked about Gardner at his pre-match conference on Monday morning Cook said: "It looks like he might be out for a while."
Chesterfield remain top of Sky Bet League Two despite just one victory in the last four games and they will look to get back to winning ways at AFC Wimbledon on Tuesday night following the 3-1 loss at Accrington.