We learn from the experiences and expertise of great Coaches that the best coaching took place when the coach knew nothing about the game, for example in the case of tennis instructor coaching a cricket player—because this forced the coach to let the player find his/her own answers.
Truly, coaching is for all people wanting to assist themselves and others make even better use of their potential. A coach is a person who supports people (coaches) to achieve their goals, with goal setting, encouragement and questions. A coach hold a coachee accountable, so if a coachee agrees to plan to achieve a goal, a coach will help motivate him/her to complete his/her plan. However, the full responsibility for reaching the goal lies with coachee.