Coach, 2 players, and a basket of tennis balls.
Players 1 and 2 start off on the baseline, and each work on half a court.
Coach feeds balls for the players to play deep forehand shots moving across the baseline, in their half of the court.
Coach then feeds balls for the players to move back across the baseline, and play deep backhand shots.
Drill continues until basket of balls runs out.
Quick feet to recover to the starting position.
Ball to be hit on the top of the bounce.
Racket head to be in the correct position to ensure ball clears the net with depth.
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."
The variety of sessions across sports - sometimes we steal session ideas from one sport and use them with another.