People think I am unemotional because my voice is flat and a bit boring. It is unfortunate but it is just the way it is. I've tried to change it but it doesn't seem to make a difference. The truth is, I have lots of emotions inside. I cried after the semi-final at Wimbledon [2012] because I was proud to reach the final and I knew how much it meant to the country. I cried after the [losing] final [to Federer], too, for different reasons. I felt I had let people down. I think people warmed to that. They could see how much it hurt.

You can't focus on other people's careers. Everybody is different.

When I'm training in December, I have to eat like 6,000 calories a day to maintain my weight. It's a bit tiring.

My girlfriend thinks I look like a reptile - it's not the best.

Tipping generally changes depending on where you are in the world. In Britain you don't always have to tip, but I always make sure I do. I have a lot of respect for waiters and waitresses - it can't be an easy job and they often don't get paid huge amounts, so I think it's important to reward them and let them know if they are giving great service.

I guess the closest I came was doing chores around the house to earn pocket money. My brother and I would have to do the washing up, cleaning around the house, walking my grandparents' dog, lots of things. We didn't get a huge amount but it was always enough to be able to walk down to the local shops and get some sweets.

It's hard because you want to be able to just, okay, focus your energy on trying to win the match, but you need to then have tactics as to how you're going to deal with how you're feeling.