John McGreal and Tommy Miller are Town's biggest doubts ahead of Saturday's 5.35pm Sky TV-screened home game against Wigan Athletic. McGreal is considered less likely to make it than Miller.
The former Tranmere man is still suffering with the calf injury which forced him to miss the trip to Coventry at the weekend.
The Blues are hopeful that Miller will be back in training on Thursday. The prospective Scotland international limped off on Saturday with a thigh injury.
Chris Bart-Williams is also expected to return to training on Thursday after missing out early this week due to a stiff back. The ex-Charlton player has also picked up a cold.
Full-back Fabian Wilnis definitely misses out and will not be back in contention for at least a month, possibly six weeks.