My grandfather went through a lot in his life.

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 physically feel very fit. I’m very motivated to keep on playing on a very high level. I’m going to try to use these years in front of me to fight for the number one of the world and fight for the biggest titles.

As a kid I was creative.

I cannot guarantee anything.

I have been through two wars in my 24 years, and I know what it's like to be without anything, to see the bombs flying above your head.

It has been the best thing that has ever happened in my life.