I see the Beijing National Stadium as an architectural project. I accepted Herzog and De Meuron's invitation to collaborate on the design and our proposal won the competition. From beginning to end I stayed with the project. I am committed to fostering relationships between a city and its architecture.

Any architectural project we do takes at least four or five years so increasingly there is a discrepancy between the acceleration of culture and the continuing slowness of architecture.

In art or architecture your project is only done when you say it's done. If you want to rip it apart at the eleventh hour and start all over again you never finish. I was one of those crazy creatures.

To work in architecture you are so much involved with society with politics with bureaucrats. It's a very complicated process to do large projects. You start to see the society how it functions how it works. Then you have a lot of criticism about how it works.

Acting is fantastic but to be able to create a whole world on celluloid is amazing. It's like taking your dreams straight from your head and projecting them onto a screen.

'Twilight' is such an amazing project and I think it opened up doors for all of us cast members.

You have to wait for a big star to come in and generate interest on a project and now that has become me which is an amazing blessing.

To be honest everything in my life outside of tennis is great. I'm doing amazing projects that if I didn't have time off I wouldn't be able to focus on.

For the last 20 years of my life I've had the mantra to do amazing parts with amazing people in amazing projects so I'm attracted to good story writing and character and good people. That's what I'm always searching for and I don't think that's ever going to change.

Anyone who writes knows that ultimately the majority of your time is spent alone in a room with a piano or a guitar no matter what the project is.