My game is a lot about footwork. If I move well, I play well.

When I was 12 years old, I was just horrible. My parents were ashamed to watch my matches. I would play on a court at the local club and they would watch from the balcony. They would scream, 'Be quiet' to me and I would scream back, 'Go and have a drink. Leave me alone.' Then we would drive home in a very quiet car. No one speaking to each other.

I'm shocked every time that I've reached so many finals or won against so many players or whatever record it is. It strikes me and makes me obviously very happy and very proud that I've been able to do it for so many years at the highest of levels.

Seriously. I'm not playing to prove anything to journalists. I'm playing for myself, for my fans,to make people happy.

Once you find that peace, that place of peace and quiet, harmony and confidence, that's when you start playing your best.

When you do something best in life, you don't really want to give that up - and for me it's tennis.

I never expected i, in the first place, when I started playing tennis, that I would ever carry the flag into the Olympic Stadium for an Olympic Games... So for me that was a surprise and a huge honor in my life to be able to represent Switzerland.