Celtic goalkeeper Craig Gordan believes that Roy Keane would be a good option for the Glasgow giants.
Keane has been linked to the manager post at Celtic and Gordon, who played under Keane at Sunderland, believes that the former Manchester United captain would instil the qualities he used during his successful playing career.
Of the speculation linking Keane with the Parkhead post, Gordon said: "I don't want to single anybody out and talk about any one candidate. That's for once the games are finished with but certainly I've had him as a manager before.
"I know how he liked things to run at Sunderland and if he was appointed then I'm sure he would do well and would be successful.
"He's hard but fair. What you see is really what you get. With Roy Keane, he was an aggressive player who wanted to win every match and from what I've seen he's exactly the same as a manager."