I never take myself too seriously.

It's such a psychological and mental game, golf, that the smallest wrong thing at the wrong time can distract you from what you're trying to achieve.

People confuse being world No. 1 with winning a Major championship.

You're the only one in control over your golf ball. It's not like tennis: you're hitting a shot and somebody's hitting it back at you.

In my case what happened next in 1999 was that I fell apart over that back nine. When I saw I was in genuine contention that year I felt like throwing up. That remains probably the most nervous I've ever been on a golf course.

I'm 37, I'm pretty fit and feel I have another eight years left - which means there's 32 Majors still to go at.

The satisfaction you get when you finally beat your dad is amazing, that rush of adrenaline.