My perception of what a great tennis coach is has changed drastically over my 12 years of coaching. At first, I thought it was the coach who gave the greatest technical advice and who also played the best. This eventually shifted to the assumption that if you were coaching an unbelievable tennis prodigy, that must mean you were also a great coach. Recently, however, my thoughts on this have shifted again. Sure, you need to be technically proficient and of course you have to want the person you are coaching to get better, but there is also something more. After all, every coach has given the same set of instructions at some point in time. Players need to be told to bend their knees, or to hit higher over the net, or to get their ball toss higher. But with this in mind, what separates a good coach from a great one?