I embraced, I think, the process of becoming No. 1 of the world, which was long and difficult, but it's sweeter in the end.

My success has a lot to do with my private life. I've matured a lot by first becoming a husband and now a father. My life is in the right direction. And that helps a player to thrive. One thing is linked with the other. My private life has helped me.

Not everybody can like what I do, and if you feel that somebody is coming up closer to you and starting the rivalry and everything, you maybe change your position to him.

Each year represents new challenges and obstacles. You have to adjust.

Mostly the problems when I was down were caused by myself. There were times when I was not responsible enough or decisive enough.

I always tried to win. I was as competitive as I am today.

Even though now I'm pretty popular in my country and tennis is the No. 1 sport, and I'm very flattered that the people recognise me and come up and give me compliments, I'm more a person who likes to have privacy and peace.