Promotion-chasing West Brom will still be without influential winger Grady Diangana when they host Birmingham.
The West Ham loanee has returned to training but remains sidelined because of the hamstring injury he picked up in the defeat against Stoke in January.
Ahmed Hegazi could sit out once again.
The Egyptian suffered an injury against Wigan and missed the clashes against Newcastle and Swansea.
Jeremie Bela is not yet ready to return after sustaining a hamstring injury in the 2-2 draw at QPR last month.
Josh McEachran remains a long-term absentee with an anterior cruciate ligament injury.
But Jacques Maghoma is closing in on a return from a thigh injury.
The Blues had been on a 13-match unbeaten run in all competitions before recent defeats against Leicester in the FA Cup and Reading in the Championship.