The more kilos you have to move around, the more it weighs on your knees. Then of course in terms of stamina, the way you move around, it's a little extra. It might not be much, but when you exercise with two, three extra kilos, you can feel a difference; it's important.

I definitely wanted this win today and I don't want anybody to talk about my nerves anymore.

Another factor is the education and culture in which you grow up. I didn't grow up in the culture of victory, where you are expected to be or have to be, the best. It was not at all like that in my family. Tennis was really a hobby. If it led to something, great. If not, there were other things in life. I think that was something I was missing at some points in my career, because when I see Hingis or the Williamses, you see how they were educated for this: to win, to be the best, a bit the American mentality. Number one. Number one. Number one. I didn't have this.

The more kilos you have to move around, the more it weighs on your knees. Then of course in terms of stamina, the way you move around, it's a little extra. It might not be much, but when you exercise with two, three extra kilos, you can feel a difference; it's important.

Unlike in my young days I'm not able to eat, drink and sleep tennis.

Yes, I have had difficult times on court and at certain tournaments but you need to forget about it and go forward because that's the way it works in our world.

When I finished the juniors I felt, perhaps for about a year and a half, that everything was going to be the same and that I would be able to go out there and win any match. But it wasnt the case. I struggled.