Chris Sutton believes Celtic should be looking for at least £25million if they are to consider selling Alistair Johnston this summer. The former Hoops striker believes Celtic are right to hold firm, especially with Johnston still tied to the club until 2029. “For me, Johnston is worth a minimum of £25million,” Sutton said. He has also become one of the more experienced players in the team, and Sutton believes Celtic look stronger when he is involved. He also questioned the lower figures being mentioned around Johnston, with some reports suggesting a fee of around £14million.