I'm not angry. As an athlete ... you should be open to criticism, and you're allowed to be criticized, because not everybody has the same opinion, not everybody likes the same players. The rankings are quite volatile: Today you're 'great,' tomorrow you're 'not,' but then you're 'great' again. It makes for great stories. Now, I always look at the long term and by doing that, obviously, I can stay calm through the storm.

When you're good at something, make that everything

Tennis can be a very frustrating sport. There is no way around the hard work. Embrace it. You have to put in the hours because there is always something you can improve. [Y]ou have to put in a lot of sacrifice and effort for sometimes little reward but you have to know that, if you put in the right effort, the reward will come.

I have two lives, and all the problems I might have, I feel like I drop them once I step on to the match court.

I did all the right things in so many tournaments. But like I said, sometimes in sports it just goes the other way. Maybe you've already won so much that it evens it out a bit sometimes. I don't know.

For me, it's important that a fan can buy something that is related to me. Like in soccer, you buy a shirt and it's got somebody's name on the back. That's kind of a cool thing.

The crowds are very important for tennis. It makes you play better, but it can also make you nervous and that's the beauty of it.