It was different when I was young, aged 20, playing the French Open. I didn't have so much experience. I just played tennis because I loved the game.
I definitely think the way the game is transforming, becoming more and more athletic, guys are great athletes out here and relying on the physical skills more than their tennis skills, almost, sometimes. So for that reason, matching up with some of these guys, I can't keep up.
I used to play rugby, polo, tennis, and cricket in school. It was only in the 1990s, when I used to live just opposite Harrods in London, that I started putting on weight. I used to have my breakfast there every day.
Golf can be tougher than tennis when things go wrong, because you can't explain things by saying that your opponent played better than you. It's a cruel sport in that way.