I am very blessed to be able to play tennis, the sport that I love and very grateful for the opportunities to play in the finals of big events, when the season starts you are on the roll constantly and obliged to be committed to daily routines on and off the court.

Sometimes I am a different character in different languages. I have different enjoyment from them. Sometimes different answers come out of me. Like, I didnt even know that about me. I get to know myself through different languages, actually.

I did all the right things in so many tournaments. But like I said, sometimes in sports it just goes the other way. Maybe you've already won so much that it evens it out a bit sometimes. I don't know.

I definitely feel there's room for improvement.

I haven't had a cramp since '99. That was my only time, in Davis Cup, when I was panicky. I was young. I'm very proud of that. Never pulled out. Never had cramps. Never lost very much because of fitness, especially later on in my career where I knew I've put in the hard work. I've done that. I've been very fortunate and clever as well to understand how I need to work, when I need to work. So I'm very happy to have stayed injury free for so long. I hope I can still maintain a few good years on the tour. I really hope so.

One of my big, big strengths I think early on in my career was that I could learn very quickly. You wouldn't have to tell me the things 10 times or 50 times until I would understand them. You would only have to tell me two or three times.

What I think I've been able to do well over the years is play with pain, play with problems, play in all sorts of conditions.