I had a nice dinner. I let the evening unfold, flow. I like to sit in a chair with a wine glass. When I woke up, I thought, 'Why didn't I go to bed at 11?' I came back at 3 and went to bed at 5.

I definitely feel there's room for improvement.

I've done so many interviews over the years in so many different languages. Radios. Papers. Magazines. There's always another interview to do. It's quite something, I have to say.

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.

Once you reach a good level in tennis it fills you with a lot of motivation. I hope I can do it for a long time.

My aim over the next few months is that I have a lot of points to defend in Miami and Hamburg, after that I can set my sights on No. 1.

I enjoyed the position I was in as a tennis player. I was to blame when I lost. I was to blame when I won. And I really like that, because I played soccer a lot too, and I couldn't stand it when I had to blame it on the goalkeeper.