Reading are sweating on the fitness of striker Leroy Lita for Sunday's opener against Manchester United after he suffered a muscle injury overstretching in bed.
England Under-21 international Lita was unable to train on Monday with the problem and his progress will be monitored by the Royals' medical staff for the rest of the week.
Boss Steve Coppell told the Evening Post: 'Leroy is in a great deal of pain. He woke up and stretched while in bed and he has done something to his leg. It is not an injury that should be ridiculed or made light of.
'We don't know what happened exactly. It looks to be a problem with a nerve. Maybe he has displaced one, but he could hardly walk and had to sit out training.
'It came on so dramatically that we are just hoping it goes away as quickly.'