FOREHAND OVERVIEW PART 3-THE COIL. In this video, SportsEdTV Director of Tennis, John Eagleton, describes how the coil of the wrist prior to hitting the forehand. This is an important step that creates the tension in the wrist required to unleash the racquet head at high speed toward the ball. Most top players today use a coil in the forehand preparation. This is video three is a seven-video series that breaks down the forehand fundamentals for today's game.