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.

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.

Lately, my mind is like an orchestra. If you don't have the conductor, you don't know what to do. One guy is playing jazz, one guy is playing rock and roll, another classical. It's a big mess.

If you are given a lot of money without having to work for it, you won't appreciate it as much as if you made it yourself.

It's easier when you play. You get your emotion out. You scream. You yell. You do whatever you want. You play. But it's tough to sit.

I don't care now if I ever win a match in my life again. Whatever I do in my life, wherever I go, I'm going to be always Wimbledon champion.

The trouble with me is that every match I play against five opponents: umpire, crowd, ball boys, court, and myself.