Yes. Today has been really stressful. We had a workout this morning. It went okay. And then just that five and a half hour wait or something. I was just shaking, could barely nap. I've just never felt like this going into a competition before. And I tried to go out here and have fun. And warm up in the back went a little bit better. But then once I came out here, I was like, "No, mental is not there. So I just need to let the girls do it and focus on myself."

First of all, you learn to manage stress. You learn to live with stress. I mean, stress is there all the time. There’s no question about it. It’s in the morning. It’s at night. It’s at 3:00 in the morning, but you need to learn how to manage stress. Sometimes it’s more difficult than others, but you try to distract yourself. Whenever I have the chance, I like to go and have a round of golf. I have a passion for modern art. I have a passion for antique carpets, classical music. To me, these are distractions, and sometimes my wife, she think I’m obsessed with these little things, but I tell her it is my way of distracting myself from just constantly continuing about my work. But the stress is there. But sometimes, the euphoria you get from a sense of achievement in many ways compensates all the stress you had for a year or two.

Never stop when you are stuck. You may not be able to solve the problem, but turn aside and write something else. Do not stop altogether.

If you get stuck, get away from your desk. Take a walk, take a bath, go to sleep, make a pie, draw, listen to ­music, meditate, exercise; whatever you do, don’t just stick there scowling at the problem. But don’t make telephone calls or go to a party; if you do, other people’s words will pour in where your lost words should be. Open a gap for them, create a space. Be patient.

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.

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.

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 :-).

Playing tennis, competing, winning, but also being at home in Spain, in Majorca, with my friends and family.

Selfishness and no respect for the others.