To be a professional tennis player you need to put in these sort of hours.

There are some guys you have problems beating because of their style - I always had difficulties with guys like Michael Chang and Andre Agassi because their returns were so good and they played so well in defence.

It's better to have done because then you know what the player is going through and you understand the pressure, but then on the other hand I know a lot of people that were good players but not good coaches, and vice versa.

But whatever happens, when you leave London you feel like a winner because it's a great venue and it's so nice to be there with all the guys.

I think each player and myself live things differently because I have no physical effort to make.

When you are very little tennis should be fun, it should be a game.

I had a coach that was not a great player, but he taught with kids and juniors so that by the time he was 50 he was great. He helped me make the top 5 in the world and yet he wasn't a great player himself.