Everything in moderation. I keep a healthy body, a healthy look. It's important not to be obsessive about anything - fitness, training, eating - because then you end up focusing on only that. And you can't obsess about anything when you're on the road.
You want a coach who is going to push you and be strong and be in your corner when it's tough, but sometimes you have coaches who think they are more important than the players. That's where the conflicts come.
Everyone wants to be happy - people find happiness in different ways. While you want to pursue your career 100 percent, I think it is very hard to give 100 percent in something else. It's important to find this balance, and priorities change throughout life.
When someone recognises you or wants an interview, you think, 'You know, maybe I've done something good. Maybe I have a good result.' So if you see it in that way, it becomes a lot easier, and you realise that, actually, you're there and you've succeeded because of the media, because if it wasn't for them, no one in the world would know us.
When you have tough times, and when you learn you can't be perfect in every situation, it's hard to accept, you know, because I still do expect that. But you just have to, because, you know, it's not about the situation. It's how you deal with it. You always have a choice.
When we were kids, I remember we'd use lemon in our hair and go into the sun, hoping it would make us blond. Obviously, I have very dark hair and olive skin, and when I was a kid, I wanted to be blond, of course. It never worked.
I was watching tennis on TV, and between games, they were showing a commercial for a tennis school. I wrote down the number, gave it to my mom, and said, 'This is what I want to do.' She thought it was a joke, but I was very stubborn, and I kept bringing it up.
If I make a change to a young kid to play any sport, not only tennis, instead of spending time in front of the TV or computer, that is good. I want to give them a good example: 'Hey, go out and play and see the world.'
You'd be surprised at how many times I'd hit the ball, and the hair would go straight into my eyes. That's why, even when I play indoors, I wear a visor, because it stops that, and I'll apply a lot of gel and hairspray to keep it tight.
When competing a lot and traveling, I have problems with my lower back because I'm always on the plane or sitting. That's something that does bother me from time to time, but I try to stay on top of it.