What I learned as a young child continues to have a tremendous impact on my life today.

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.

I try to enjoy what I do, and every moment of the life that I have is a blessing. What else can you do but to be happy and try to bring that joy to the other people around - especially in the tournaments. Everybody has bad days. I'm not always funny or laughing.

I have always valued the care for my body, and my mind and had holistic approach to life. I always thought this is utmost importance for my tennis.

In order to stay where I am - and I want to do that - I have to stay dedicated as well as I have been before I became No. 1.

What I learned as a young child continues to have a tremendous impact on my life today.

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.