The diagram is set up for a right handed player returning the serve. About 85% of all tennis players would rather return a serve with their forehand. Don't let them. Practice serving to your opponent's backhand. Don't forget to practice to the left hander's backhand as well.
Fundamentals
Muscle memory
Develop confidence
Create a resolution to develop your coaching confidence by seizing the opportunity to discover new drills, turn ideas into action and seek advice from the coaching community.
World Rugby has reportedly conceded Aaron Smith's disallowed try in the World Cup final should have stood.
"It is not only useful for staff who are experienced but a valuable tool for those subject staff who have to take teams."