Footwork is probably the most important part of tennis. Unfortunately, it is also one of the most underrated areas of the sport. Learning to move around the tennis court correctly is EXTREMELY important. Correct footwork lets you use correct stroke mechanics when you hit. Correct footwork is what typically sets advanced tennis players apart from everyone else.
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This video falls under tennis footwork.
Footwork is arguable the most important part of the game. Moving to the ball and recovering after each shot correctly is absolutely critical — great forehand or backhand technique means nothing if you can't get to the ball. Great footwork is a skill shared by all of the top pros on tour.