Tennis is a hard sport. There is a lot of competition all year and you play alone.
I admire a lot of people, but in terms of sport I've always loved the mentality of Tiger Woods on a golf course. I always love his eyes when he's setting himself and focusing on his decision; he has a really strong, focused face and believes that he can make the shot.
I've stayed calm when I'm winning and I've stayed calm when I've lost. Tennis is a sport where we have a lot of tournaments every week, so you can't celebrate a lot when you have big victories, and you cannot get too down when you're losing, as in a few days you'll be in the next tournament and you'll have to be ready with that.
Some people get very confused about my game. They think it's better if the court is slow, because I have a good defence. But the faster it is, the better for me. My spin is more painful for my opponents, my aggressive game works better.
I am happy with being a tennis player and the choice I took when I was 12. But clearly, if I wouldn't have been a tennis player, I would have loved to be a soccer player. But again, I am happy with the choice I made.
My goal is to improve my game, stay healthy and be competitive. If I have that, I know I can be able to win tournaments, which in the end is what it counts.
My motivation and aspiration is the same, being number one or being number five. So that's the truth. And my goal is the same - it's to always be happy playing, it's to enjoy the game and improve always.
I still take advice from my mum on what clothes look good on me. I used to listen to her a lot more, but I've started to choose my own things from time to time.
I am very lucky because when I come back home, I have a completely normal life. I can relax, playing golf, fishing - doing what I want. I know when I finish a tournament, I am going to relax at home.
I am not the most courageous guy in the world outside of the court. Being alone in the dark is something I don't like.
I have lived my whole life with high intensity.
In my humble opinion, change is stupid.
I was passionate about soccer. I still am. Odd, though - playing soccer always made me much more anxious than playing tennis. On soccer days, I'd be out of bed by 6 in the morning, all nervous. But I was always calm when it was time for a tennis match. I still don't know why.