RYAN Cresswell could face surgery on his injured ankle.
The Rotherham United skipper damaged ligaments in training last week and was missing last Saturday.
He is now to have further specialist examination and manager Andy Scott says that he may well face an operation adding: “The worst-case scenario would then be that he’s out for a while.”
He added: “If that’s the case then we may have to look to bring someone in.”
There could be a doubt over former Blades left back Stephen Jordan extending his trial spell.
He has a hamstring injury, and didn’t play for the reserves this week.