Rangers are awaiting the results of a scan on Agyemang's leg amid fears he has suffered a stress fracture of the tibia.
Neil Warnock's squad is stretched as centre-half Matt Connolly is suspended, full-back Kyle Walker's loan has expired, striker Antonio German is cup-tied and Peter Ramage, Akos Buzsaky and Lee Cook (all knee) are on the sidelines.
Warnock plans to make changes with promotion his priority, but he vowed to pick centre-backs Clint Hill and Kaspars Gorkss again after their mistakes gifted Bristol City their goals in Monday's 2-2 draw.
Norwegian midfielder Petter Vaagen Moen is expected to make his full debut.
Source: PA
Source: PA