Also pulling out of the Wales sqaud ahead of their games with Iceland and Netherlands is Doncaster Rovers midfielder Brian Stock. Stock picked up a back injury in Rovers dramatic 1:0 win over rivals Leeds United in the League 1 play-off final at Wembley.
Cotterill who is on-loan from Wigan Athletic is unknown where his future lies. Athletic boss Steve Bruce has admitted that Cotterill still does have a future at the JJB but Blades boss Kevin Blackwell will try his hardest to persuade him to sign a deal at the Lane.