Generally speaking, envy, resentment, revenge, and self-pity are disastrous modes of thought. Self-pity gets pretty close to paranoia and paranoia is one of the very hardest things to reverse. You do not want to drift into self-pity.

I’m irritated by critics and academics who dismiss poetry that is popular, comprehensible or humorous.

An inability to see the other side.

People who are proud of their ignorance.

If I don't do that with the bottles, then I sit down, I could be thinking of something else. If I do always the same things, it means that I am focused and I'm alert to think purely about tennis.

Sometimes when I'm in the first round or second round, and I'm not playing well, I say, okay, just accept it. Don't get frustrated. Just accept and focus.

The word says it all. To be a friend means that they are always there, for the good or the bad.

I don’t think I have one in particular. I am pretty calm. Just some small things that I better not comment on :-).

These tics do bother me. Could I play a match without them? Yes, without some of them. I don't have to touch my nose or put my hair behind my ears before I serve. That's possible to stop. Not putting the bottles in front of my chair, I could go without that, too. But adjusting my underwear, that I could never get rid of. It's impossible.

Just normal people from my hometown, from my country.