Although tennis and racquetball are non-contact sports, there are some important reasons why an athletic mouthguard is helpful. Rich Gray, a tennis professional at Midtown Tennis Club in Chicago, observes that balance is the key to hitting the ball out in front, and that without balance, control of the ball is lost. In addition to better balance and control on the court, increased stability and stamina will allow greater power in your service and returns. Long matches will be less fatiguing due to better body mechanics and greater range-of-motion. With better balance and flexibility and strength, injuries on the court will be reduced.