I play each point like my life depends on it.

It should not be a child's only goal to become the best player in the world. That would be a bad, a harmful attitude.

The bad thing about the [tennis] calendar is how it is made and obligates you to play tournaments all year. If you want to achieve the most you can (and) go as high up (in the rankings) as you can, you have to play from the start to the finish because there are important tournaments from the beginning to the end.

It's more a tennis problem than a mental problem. The transition is difficult. It depends how much time you have. Playing on grass can sometimes be a bit of a lottery.

It is important to recognize the small successes.

Some people get very confused about my game. They think it's better if the court is slow, because I have a good defence. But the faster it is, the better for me. My spin is more painful for my opponents, my aggressive game works better.

I learned during all my career to enjoy suffering.