If I feel I'm not influencing games, not scoring goals or making goals, then that's the time I'd pack it in.

My dad played rugby, so I used to watch a lot of rugby union and rugby league.

If I feel I'm not influencing games, not scoring goals or making goals, then that's the time I'd pack it in.

I had an early taste of fame. I was 20, going out with TV presenter Dani Behr and we'd have paparazzi chasing us. I'm not comfortable being photographed, though I accept it is part of the job. I had to ask myself, 'What comes first, being a celebrity or footballer?

I have always considered myself to be very fortunate. To play for the biggest club in the world, which also happens to be the team I supported as a boy, means I have never had to consider changing away from Manchester United.

When Cristiano Ronaldo gets the ball, you can just leave him to it while he beats player after player.

There's never been completion in my football career because I've always been striving for that next thing. You listen to people who have finished and nothing replaces playing, but I'm still excited about not having to put my body through what I've put it through. And not feeling the disappointment that I feel.