I don’t know if there is any topic about these but I would like to know your opinion (or list if you have it) about the greatest tennis coaches of all time. But first, I would like to ask some questions: what is your opinion about the real importance of tennis coaches? Can they really make the difference in the pro’s careers? Comparing to other sports like football, what similarities and differences do you see? Finally, do you think ex-professional players with a discreet pro career are better coaches then the ex-best pros? Thank you in advance.