"Joey could do a fantastic job for Celtic if he decided to try his luck in the SPL. That's why I believe Gordon Strachan would not be taking a risk signing him,” Hibernian’s Killen told The Daily Record.

"Put it this way, I remember playing in the City youth team and thinking Joey was the sort of player you'd want in your team making two-footed challenges against the opposition rather than making them against you.

"Joey Barton could certainly fill that Neil Lennon role in the midfield no problem for Celtic.

"The Champions League is definitely something that would appeal to Joey and unless he gets a move to a big Premiership side or to a top European club he might not get that opportunity.”