Head Coach Dean Smith says he is hopeful on the fitness of captain James Chester and the influential John McGinn for Sunday's clash with Birmingham City.
Chester was substituted off in Wales' game against Denmark in Cardiff last Friday, while McGinn also returned early from international duty with Scotland.
Smith will now assess the pair over the coming days and make as late a call as possible on their fitness.
He said: "It's still a bit early for Chester and McGinn to be fully assessed. But I'm hopeful that both of them will be ok.
"We'll be leaving it late to make a decision on both of them, but they won't have lost any fitness. Chester played 50 minutes for Wales and McGinn has featured in a lot of games for us.
"They're naturally fit players, but I'll need them on the training ground on Friday and Saturday for assessment."
In other news, Neil Taylor looks set to make the Second City Derby, having shaken off the knock that saw him end his Wales recall early.
Birkir Bjarnason, however, hasn't featured for Iceland over the international break, and continues to be hampered by a groin problem.
"Taylor will be back training with us today. He'll be available for selection as long as he gets through the next few days.
"Bjarnason is struggling a bit – he's suffering some inguinal pain around the groin area. He's not really trained these last couple of weeks, so we'll have to wait and see on him."