“All captains do it in different ways. For me, just to see his growth as a player and as a personality on the field … to captain a club like Celtic you need to have big personality on and off the pitch but you also need to have the humility and what’s what always strike me with Callum.

“He’s an absolutely brilliant player. He was majorly influential in me coming back here. To work with someone like that, knowing what he would bring, knowing his professionalism is at the very highest level of all the players I’ve ever worked with, and then his performance level. It’s great to see. He’s developed into an incredible player and a great man also.”