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

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.'

Listen, everything I did in my childhood was competitive. Everything we did my dad made it into a game to win. We used to drive my mum nuts.

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

Sometimes Americans don't quite get my sense of humor. My good ol' British sarcasm seems to go over their heads.