If you become great, then you can become happy. If you're happy first, it's much more difficult to be great.
Ivan LendlBut it's very difficult, I can tell you I played the Czech Open a few times and it's very difficult just to go on to a scene where the course is prepared differently when the greens are fast and he's not used to it and they're hard as a rock and he's not used to it.
Ivan LendlMy serve and my forehand I pretty much always had, but my backhand was a made backhand. I worked on it for years.
Ivan Lendl