All sports are continuously developing, but what they all have in common is that the speed is increasing. That's also true of tennis; the ball is getting faster and faster.
Rafael NadalI'll never have a tattoo - I just don't like them, and when you're old they can look a disaster. As for piercings, I don't like them on men.
Rafael NadalToday people hit the ball with much more strength. Almost every player is capable of playing a winning stroke from any position. This means the balls arrive more quickly. If you want to reach them, you have to slow down from a high speed or suddenly change direction. These are moments when you can injure yourself, and that's what wears us out.
Rafael Nadal