"I've played all over, including midfield and forward but obviously Sir Alex Ferguson believes I'm best at the back and I think central defence is my best position. Roy Keane is a fantastic player and he communicates and helped me out. It'd be great to play some more with the first team. If I do, it'll be fantastic but if not, I still have some time ahead of me."
Fergie also had some words of encouragement for the young American, who made an assured debut against Bayern
"He had a difficult task today and coped with that very well. He'll be very pleased."