Tennis has given me so many opportunities, and I feel very lucky to have achieved whatever I have, especially coming from a country that does not have a great history in the game.

Coaches were all saying that I was really talented and I had potential, but coming from Serbia, it wasn't easy. The '90s were the hardest years for our country - we went through two wars.

Everyone wants to be happy - people find happiness in different ways. While you want to pursue your career 100 percent, I think it is very hard to give 100 percent in something else. It's important to find this balance, and priorities change throughout life.

I think it's better not to mix professional life and personal life - although it is hard.

Throughout my football career, I've always been somebody who's been very aware, and I know when the camera is on me, and I know how to be polished. I can see how that might come off as disingenuous.

I lived to play basketball. Growing up as a kid, Bill Russell and the Boston Celtics were my favorite team. The way they played, the teamwork, the sacrifice, the commitment, the joy, the camaraderie, the relationship with the fans.

What's so wonderful about football and business and show business is that every time I start thinking I'm special, I get knocked on my ass.

Arsene Wenger has not just brought success to Arsenal. He is a very creative manager, producing almost fantasy football.