Keane told the Sunday Sun: "I'm quite happy with Stokesy. I like him and he's got a chance.
"Obviously, we are always wanting more (from him) but we have to be careful not to put him under too much pressure because he is still a young man.
"Stokesy is a very talented player - probably the most talented at the club - but sometimes talent is not the most important part of being a footballer, believe it or not, and lots of other things come into it.
"But there's definitely more left in the tank from him and it is up to us to get it out of him."