You can not say you're unhappy because you have to travel, have to play this tournament, having to play sports ... You can't because you chose to play it and you love it. I'm tremendously grateful for the support I have received from my family and the close ones.

My grandfather went through a lot in his life.

Tennis is a mental game. Everyone is fit, everyone hits great forehands and backhands.

It is very important and my success very much depends on the harmony that I feel in my private life. It is essential for me to be happy in my private life. And if it continues, I am able to continue playing tennis.

I don't think, that you can always - you can ever - get your game to perfection, you know. Only if you're Federer.

I always try to show my human side to my colleagues and to the whole circuit. More than anything because we are all on the same train, it is part of our work.

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.