I tend not to argue about things that I don't believe in.

Davis Cup, you know, does take a lot out of you over the weekend. It's tough, especially if you play all three days.

I had to pay an incredible amount to get insured on it and, after a couple of weeks of driving it around, I realised it wasn't quite my style. I'm not flash by any means but a bright red Ferrari is a definite head-turner and I hated that. It was also incredibly impractical, particularly when it came to finding space for a friend or for my tennis bag, so I decided to sell it after a few months.

In tennis, it is not the opponent you fear, it is the failure itself, knowing how near you were but just out of reach.

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've realised over the years I play my best when I have time to prepare for each tournament as best as possible.

Where resources are plentiful (i.e. no constraints), you will find very little creativity. Where resources are scarce (i.e. many constraints), you will find an abundance of creativity.