Today 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.

I am lucky because my family are comfortably off. My father has his own glass business.

That's painful always to lose.

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 don't think about how going to be the match. I think about try to do the right things to win. I don't think about how easy can say or how tough can say. I go on court. I try my best.

I will work day after day like I did my whole life ... I'm not going to change anything.

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.