Defensive perimeter players are commonly known as "marking people." Most offensive players on the perimeter shoot well, have an advantage in speed, and also have a certain shooting percentage and distribution ability. When the opponent dribbles, you should keep a slight squat posture, and keep your body center of gravity on the support foot and close to the dribbler of the opponent, which is conducive to the follow-up when the opponent suddenly starts. When following up, the defender's body should always keep a positive confrontation with the attacker (if the opponent is much faster than you, you should pay attention to the rhythm of sideways follow-up when the opponent overtakes you, which is easy to cause defensive violations). Outside pitchers often create shooting opportunities of 1-2 seconds by dribbling and changing lines. If you take such a defensive posture, the attacker rarely has a chance to get out of your control completely. Even if you shoot, your personal interference will lead to a decline in the hit rate. All pitchers have an inevitable prelude to shooting, that is, lifting the ball in their hands or aiming at the basket from the front of their bodies. If the attacker is not fast, he can lift the ball over his chest and shoot it off. Even if he fails to get the racket out of the attacker's control, it will greatly interfere with his shooting rhythm. In view of the fake action of perimeter players (pretending to shoot after jumping to attract defenders to break through), there is basically a small skill in man-to-man defense, that is, when the opponent is faking, he should look down to see if his feet are off the ground. If he is off the ground, he should take off quickly and block it with all his strength. No matter whether it can be blocked or not, at least he should make a blocking gesture to let the opposing player take care of it when shooting. If the dribbler's feet don't leave the ground, he should continue to maintain his center of gravity and prepare for the opponent's dribbling breakthrough. In addition to a player who controls the ball, there will be players who are running without the ball and ready to meet. Defending such a player should also be within your control, and the distance from him should be at least one step. Keep your eyes on the position, and you should see both the player who controls the ball and the player who defends without the ball (this is very important and is an important criterion for confirming the defender's position). Always keep the dynamics of the player without the ball you are defending. Once you find that he is accelerating, accelerate the position between the attacker and the basket accordingly, so that the player without the ball has little chance of cutting empty-handed. Even if the attacker takes the shot, he can't relax, and always keep such a confrontational state with his opponent, which can greatly restrain the opponent's attack and rebound.