If you want a measure of how private a place the dressing room was when I was growing up at Manchester United, consider this: even Sir Alex Ferguson would knock before coming into the dressing room at the Cliff, the old training ground. The dressing room is for the players - and the players only.

From United's point of view, it is always difficult to tell just when a young footballer is going to mature into a first-class professional ready to play at the highest level, but the story of how Pogba slipped away from United has more than one strand to it.

I first remember Wayne Rooney from a game at Old Trafford in 2002 when he came on as a late substitute for Everton and, in a brilliant 15-minute performance, skipped past me on a couple of occasions.

My view is that you show Messi one side or the other, and if he goes past you, he goes past you. But if he slips it through your legs, then you have to obstruct him and take the foul. Just don't ever let yourself be nutmegged.

I will never be a career actor, I don't think. I don't feel that I have the skill set to jump into it that way, although I wouldn't mind giving it a try.

Failure is inherent in the game. So if you don't respond well to adversity, you're probably not going to have a long career.

I am very picky with my career. I don't need to do it for the money or the fame. I'm very choosy, which is why I haven't played the typical role that people expect to see from someone of my stature and size, as the mean jock or the preppy. It's very easy to see me like that. That's why I go against it in different roles.

My job at Stanford is rather different from the ones I had held previously in that my own ambitions must take a back seat to the well-being of the students with whom I work.