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.

Any idealist who tries to join the Peace Corps must realize he is not going to change the world overnight.

But what I really believe is education is a key to pretty much everything - prosperity, economics, peace, stability.

Satan has declared war on motherhood. He knows that those who rock the cradle can rock his earthly empire. And he knows that without righteous mothers loving and leading the next generation, the Kingdom of God will fail.

Businesses succeed when societies themselves succeed. When countries are affected by violence and the absence of the rule of law, business can and must be a messenger of peace.