I honestly think I am a better player than I was four years ago, when I was No. 1 in the world.

It's not easy to play your best for 40 weeks. It happens every year, I don't play well in Rome or Hamburg -- I don't know why -- but then I play well after that.

I was worried a bit at the beginning because I didn't know how the situation was. Once the ATP wanted to do the tournament, I realised there was no risk at all. I'm very sorry about what happened. It's not easy to be here knowing so many people were killed very near from here.

I honestly think I am a better player than I was four years ago, when I was No. 1 in the world.