Sheffield United boss Paul Heckingbottom admits Robin Olsen could be on the move this month.
The Sweden goalkeeper is being linked with Aston Villa.
Heckingbottom told talkSPORT: “This is one of the situations we monitor.
“But nothing has happened yet. It has been speculated about Robin but it is in our hands, so the only way he can go is if we have a replacement.”
Olsen is likely to move to Villa Park in the form of a loan transfer.