Ward was forced off with a dead leg just before the hour mark in Tuesday night's 6-1 hammering of Huddersfield.
Reds boss Billy Davies said: "Hopefully with a few days of rest he will be okay."
If Ward does not make it, Danny Collins will come in at centre-half.
Fellow centre-back Daniel Ayala, on loan from Norwich, is "around six days away" from returning from the hamstring injury that has kept him out for almost two months.
Davies has also revealed that Chelsea full-back Sam Hutchinson has returned to training and should be back to resume his loan spell with the Reds within the next fortnight
Davies reported no new absentees following the Huddersfield game ahead of his first away match since returning as manager.