Tennis Drill Demonstration
Coach stands in front of the player and feeds random balls (Forehand, Backhand, Low, Short, Deep etc). Player has to react and adjust to incoming balls.
Variety is a great tool to practice reaction skills. Players can't know where the next ball will go because it reflects real tennis situation. Coach should also emphasize proper decisions during this exercise (When in defence, players should hit higher with more topspin; When in offence, players should be more aggressive).