Chesterfield defender Gregor Robertson will be out for at least a month with a thigh muscle injury following a scan this week.

It could have been worse as there had been initial fears that the strain to his gluteus medius muscle could have put him out for the rest of the season.

Meanwhile, Jack Lester (ankle), Peter Leven (knee) and Derek Niven (toe) have a chance of recovering in time for this Saturday's home game against Brentford.