If you are not physically strong, it's difficult. But at the same time, I think you need something more than that; you need to vary your shots, as Justine has been able to do in Amelia or Charleston, where she beat her -- I can't remember where it was on clay. So you need this kind of thing. But of course if you're not fit, you'll never make it through.

Right now I have more confidence in myself. I grew up.

I have been amongst the best players in the world for 8 years. None at that level played as many ties as I did.

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.

There were many occasions in my career where I could have given up, where I asked myself whether I would ever make it.

This trophy is so special in the world of tennis and it feels great.

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.