Keane said: "You have to be tough on these young players sometimes. I am not one to put my arm around them. They have to grow up fast and learn fast. They are not just on a trip out here.
"I have told them they have to get in the habit of winning and show some pride and I hope they have taken that on board. That is the sort of thing Bryan Robson told me when I first came to this club.
"We have lost both our games so far and I don't want us going home with a third defeat when we play AC Milan on Saturday."