Armbeep Tennis For over a century we have been perfecting tennis skills shot by shot. Because breaking down game complexity into backhands, forehands and serves makes it more manageable and easier to learn. But on tournament day what counts is how to use techniques in context of point, game and match. Mastering this skill separates champions from second tier players. Armbeep delivers an affordable portable motion analysis device that allows players and their coaches to master the art of tennis with game-based coaching.