The coach is where current and aspiring players turn to learn the basics of tennis, to refine their swings, fine-tune their serves and advance their skills and their pursuit of our lifetime sport. For many, coaches are their point of entry into the game. As such, you serve many functions, from teacher and motivator to cheerleader and psychologist.
https://www.usta.com/en/home/coach/coaching-resources/national/coaching-opportunities.html