Green believes the player's natural confidence will enable him to thrive in the game at the highest level.
He said: "He has got such a brilliant mind and he is so confident. When he goes out there he will try things and he will try it on the biggest stage.
"He will do something and you will ask him: 'When have you done that? Why did you do that?'
"He would say 'because I've never done it before and I thought I'd try it'.
"You knew from the way he spoke and the way he is around the lads, the way he holds himself and obviously his ability, he is going to be at Chelsea for as long as he wants to be and then, maybe, on to greater things."