The Morocco international missed out for the second successive weekend and Warnock revealed the midfielder needs to improve his fitness.
"He is training hard and was at the training ground [on Saturday]," he said. "I think he has to get himself a little bit fitter.
"He knows what I feel about his fitness levels, but he trained hard today.
"But I am not sure that would have been a game for him anyhow.
"I thought we played well going forward."