The primary careers in tennis involve coaching and providing support for professional players. As a coach, your responsibilities are to guide athletes during training and matches and help prepare players for participation in a tournament. Your duties include teaching players about single matches, doubles matches, the rules of tennis, what each part of the tennis court means, and other aspects of the sport. The specifics of the job vary based on the level you teach or where you work, from basic development with youth to the more advanced high school, collegiate, and professional levels. Serious athletes often hire personal, long-term coaches, and you may work with just a handful of players throughout your career.