Martin Cranie will be sent for a second x-ray by Coventry in an effort to discover the extent of his rib injury.
Cranie picked up the knock during the 2-0 defeat to Barnsley on Saturday, and is still in pain four days after the incident and manager Andy Thorn has said the Sky Blues' medical staff are keen to find out exactly how bad the damage is to the defender.
"He's had an x-ray but he's still pretty sore," Thorn told the Coventry Telegraph.
"The results didn't show a break or fracture or anything but he's in that much pain that we are having to have another one done to scrutinise it even more.
"They seem to think it might just be really badly bruised but he can hardly move or breathe."
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