Tennis is not like other sports where the coach is hired by an independent entity, and that makes a huge difference in the dynamic.

Tennis is basically a game where you try to create an opportunity for yourself to finish the point, because you can't wait for the opponent to miss anymore. Well, if you create an opportunity and don't take advantage of it, you let the opponent back to even, then you are just starting the point over, so you have to take advantage of them.

Many tennis coaches are enablers. They need the job more than the player needs the coach, and if the coach needs the job more than the player needs the coach, he can't effect change.

Ivan Lendl Quotes