I do not play tennis but read this book because some horsemen recommend it. I found it useful as the book explains how good our body is at computing and calculating what it needs to do to perform certain actions - such as a tennis stroke or for me riding a particular movement or working with my horse on the ground. It explains how our conscious mind gets in the way, sometimes by thinking we are not good enough or piling on pressure to perform as our ego interferes. Our conscious mind wants to dissect how we do some physical action and this is enough to affect our natural game and ability. I am very guilty of over analysing things so am trying to be more in the moment and trusting my body to get it right - shutting my conscious mind out is not easy. I would recommend this book for anyone wishing to play a sport or instrument as it may help you to stop micro-managing aspects of your game or playing.