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.
I'm very fortunate to have the support of the people around me, I feel happy because my wife helps me and people who are close.
It's interesting that I had such a close relationship with my grandfather. Because your parents always judge you: they say, 'You shouldn't do this, you shouldn't do that.' But with your grandparents you have a feeling that you can say anything or you can do anything, and they will support you. That's why you have this kind of connection.
The confidence is there, the game is there, but physically you can't fight nature sometimes. You can't do much about it.
My nutritionist has done a great job in changing my diet after we established I am allergic to things like gluten - I can't eat pizza, pasta and bread. I have lost some weight, but my movement is sharper and I feel great.
No, I have something else between my legs.
Coaches are very important to players. They're people that are mentors, people that are advising them, people that should be their friends and somebody you can rely on on the tour.
I haven't been in tennis for that long, but what I can say is that we have a lot of young guys at the top who are willing to do a lot of good things for tennis in general.
Serbian history tells that family is the most important thing and you have to stick with the family.
I never wanted to change countries; it's something that is part of me.
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.
It gives me goose bumps and little butterflies in the stomach when I start thinking about the 'golden slam.'
I understand that the results I've had in my career, or I'm having now, they are very good. And that gives me confidence, of course, but I do not feel invincible.
Nadal's the best player in history on [clay], and he is one of the best-ever players that played this game.
I still feel young as far as motivation is concerned, and also the challenges that I have for the future and what I want to achieve. So I just hope this successful streak is extended to the fullest.
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.
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.
I'm happy, my family's happy, everything is going well.
It has been the best thing that has ever happened in my life.
When my boy arrived in this life, on this planet, it was completely a new dimension of experience for me and my wife. I'm still riding on the wave of that experience.
Imagine a part of the U.S.A., from which the U.S.A. started - where is the cradle of your history? This is Kosovo for Serbia.
Messi is the best player on the planet and he keeps on improving at Barça, now the best team in the world. What Messi does on and off the pitch is an inspiration for children who dream of becoming a footballer.
Well, I do feel that I carry the responsibility of representing my country wherever I am, and this responsibility came with the success that I had in last couple of years, not just myself but the whole group of tennis players that comes from Serbia. And athletes in general are, in this moment, the biggest ambassadors that our country has.
This time last year I would have said Federer would beat Sampras's record. Now I'm not so sure. His aura has gone. He's not as dominant as he was, and since I beat him in Australia he's looked frustrated. Players are beginning to challenge him now, especially myself and Rafa. He's got 12 Grand Slams to his name and maybe he will beat Sampras, but now I'm here it will be tough for him.
I always try to have something that keeps my mind relaxed, keeps my mind a little bit off tennis.