In Tennis, a chop stroke is a shot where the angle towards the player and behind the racquet, made by the line of flight of the ball, and the racquet travelling down across it, is greater than 45 degrees and may be 90 degrees. The racquet face passes slightly outside the ball and down the side, chopping it, as a man chops wood. The spin and curve is from right to left. It is made with a stiff wrist.
The slice shot merely reduced the angle mentioned from 45 degrees down to a very small one. The racquet face passes either inside or outside the ball, according to direction desired, while the stroke is mainly a wrist twist or slap. This slap imparts a decided skidding break to the ball, while a chop "drags" the ball off the ground without break.
The rules of footwork for both these shots should be the same as the drive, but because both are made with a short swing and more wrist play, without the need of weight, the rules of footwork may be more safely discarded and body position not so carefully considered.
Both these shots are essentially defensive, and are labour-saving devices when your opponent is on the baseline. A chop or slice is very hard to drive, and will break up any driving game.
It is not a shot to use against a volley, as it is too slow to pass and too high to cause any worry. It should be used to drop short, soft shots at the feet of the net man as he comes in. Do not strive to pass a net man with a chop or slice, except through a big opening.
The drop-shot is a very soft, sharply-angled chop stroke, played wholly with the wrist. It should drop within 3 to 5 feet of the net to be of any use. The racquet face passes around the outside of the ball and under it with a distinct "wrist turn." Do not swing the racquet from the shoulder in making a drop shot. The drop shot has no relation to a stop-volley. The drop shot is all wrist. The stop-volley has no wrist at all.
Use all your wrist shots, chop, slice, and drop, merely as an auxilliary to your orthodox game. They are intended to upset your opponent's game through the varied spin on the ball.