I've had my ups and downs in my private life.

The tradition in Serbia has always been team sports - football, basketball, handball, volleyball and water polo, individual sports are not supported.

The fact that nobody played tennis in my family and you'd say by chance they make three tennis courts in front of the restaurant that my family owned when I was 4, I think that's a destiny. That's kind of life circumstances that kind of come together for you to become who you want to become.

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.

Tennis is my life, obviously; I need to focus, I need to win. But it's not the only thing. I'm not going to play forever.

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

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.