I am a very positive thinker, and I think that is what helps me the most in difficult moments.

The week before the (US Open) I gave a few interviews for CNN, USA Network, New York Times, USA Today and Sports Illustrated which had been arranged beforehand. The reason for giving these interviews is not only because working with the media is just part of the job, it is much more my desire to contribute to the promotion of tennis in the U.S.

I have learnt to be even more patient.

You live during the match, and you have strong emotions, but you don't want to get too overexcited. My body's totally flat now. I cannot move anymore. I'm totally exhausted, just because of the tension out there.

I definitely need to use my chances when they come because definitely there wont be many.

I have a very strong opinion. I'm absolutely against it. I'm against the challenge system. I'm for the way it is right now. Don't change that.

It's not so simple to just stay in the moment and trust your game and your strength that you can turn it around.