Although we didn't have much when I was growing up in Split, Croatia, my parents always tried to ensure that my sister and I had the things we needed, and it was enough for us.

At her birthday, my seven-year-old daughter will say that she wants these big cakes and certain expensive toys as presents, and I can't say no to her. It would just break my heart. But when I was little, for birthdays we just played outside and we were happy if we got any cake.

It's fun to be there with the guys, to practice with them, arrange the balls, do this, do that, but when you play you can get some of this nervousness out of your system.

Winning Wimbledon was a great feeling and it is still a great feeling. It has given me so much confidence.