When coaching footwork to clients I like to emphasize 3 essential fundamentals for great efficient movement.
1.) Don’t reach for the ball – This requires great footwork out to the ball and a solid stable hitting stance.
2.) Avoid falling off your shot – This requires fantastic balance and correct use of the non dominant arm and leg.
3.) Don’t jump as you hit – This means effective contact move selection, moving from a solid foundation, letting the ball drop into the strike zone and keeping the angles in the legs so good extension of the racket head through contact is achieved.