By doing this, players will develop their individual and most efficient style, which is exactly what top athletes do. If we observe top players at major tournaments, we find quite a few different variations and expressions of tennis techniques. Physical constellations, strength ratios, leverage ratios, agility and flexibility, and other parameters are determining factors. That is why it is not always worthwhile to copy exactly what the top players are doing. With contrast exercises and differential learning, coaches can instead find the optimal style for each player.