Reading's USA international winger Bobby Convey has suffered an injury setback.
Royals boss Steve Coppell said: "Bobby has tweaked something right at the top of his leg. He is massively disappointed. That will take him out of contention, I would think, for the weekend.
"He crossed the ball and something went and he had to come in for a bit of treatment. He tried it in a five-a-side but had to come in again. I can't see him being fit on Friday morning."