"Sometimes when Cole is holding up the ball he reminds me of Mark Hughes," said Zola. "Hughes was fantastic at holding and protecting the ball.
"Carlton is close to him but also very fast. He needs to improve his finishing a little bit but he's on the way.
"I've had to put my arm around his shoulders - well, I think I did but he's a bit too tall so maybe it was his waist!
"That's because Carlton is certainly one of those players who doesn't know how good he is. Simple as that. But because I've seen so many different players up close I can realise what kind of players I have in front of me.
"He's getting better and better. For me he is not near his peak."