Although abdominal and groin injuries are not unique to the game of tennis, the very mechanics of the ground stroke and overhead volley predispose participants in this sport to the chronic pain and frustration of these injuries. Careful consideration must be given not only to the muscular anatomy of the region but also to the visceral and neurologic anatomy. A patient, controlled program of rehabilitation, emphasizing flexibility and subsequent strengthening, must be stressed if recurrence is to be avoided.