As an avid tennis player, I am always trying to be in tip-top shape- on AND off the court. A large factor in athletic performance is diet and hydration , so it is important to know what to eat before, during, and after a match in order to succeed. Tennis is a sport that may take hours, and keeping a steady intake of water, electrolytes , and complex carbohydrates, just like the pros do , is the most important step to a , win. Don't worry- I splurge on an occasional Cookout milkshake here and there. Everything in moderation, right?