Used when performing a ground stroke. Rather than hitting the ball and stopping your racket head quickly, you Follow-through with the racket so it almost ends up over your shoulder. The Follow-through is very influential in the length, speed, and direction of the ground stroke.
(REASONABLE) The action used by a player in continuing the movement of his racket after it has contacted the ball. A follow-through is reasonable if it is not excessive. An excessive follow-through is one in which the player's racket arm is extended towards a straight arm position with the racket also extended with the shaft horizontal - particularly when the extended position is maintained for other than a momentary period of time. And excessive follow-through is also one in which the arm extended towards a straight position takes a wider arc than the continued line of flight of the ball, even though the racket is on the correct vertical position. The Referee's decision on what constitutes a reasonable as distinct from excessive follow-through is final.
Carrying a process, plan, or project to full completion; as, I appreciated his follow-through on his promise. The term usually is used in reference to the period after some point in time at which the actor is given freedom to pursue the project.