People always say golfers don't smile. But there is so much psychology in golf so we have to be a bit robotic.

My dad said: 'It looks like you'll be world No.1 in a few hours and I wanted to be the first to say congratulations.

People always say golfers don't smile. But there is so much psychology in golf so we have to be a bit robotic.

People mature at different stages and I feel I'm learning a lot.

I'm a golfer - not an athlete.

Golf is played between the ears and if you are not 100 percent focused on what you are trying to do, then people will go past you no matter who you are.

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.