篮下防守犯规（Defensive fouls in the post）

防守方膝盖顶人犯规（Post Defender uses knee）

篮下防守犯规之一：防守方抬腿，并用膝盖顶人，属防守犯规

Defensive Foul in the post, dislodging, defender uses knee

Commentary:

This is an example of a defensive foul for dislodging. A post defender may not dislodge, reroute or impede an offensive player. A defender may legally position his leg between the legs of an offensive player in the lower defensive box to maintain his position. However, once the defender's foot is lifted off the floor, dislodging his opponent, a foul shall be assessed. On this play, the post defender uses his knee to dislodge his opponent.

防守方撞人犯规（Post Defender dislodges opponent） 

篮下防守犯规之二：防守方用身体顶撞对方球员，属防守犯规

Defensive Foul in the Post, defender dislodges opponent, "body bump"

Commentary:

This is an example of a defensive foul for dislodging. A post defender may not dislodge, reroute or impede an opponent. When guarding an offensive player with the ball with his back to the basket in the lower defensive box, a defender may use one hand with a bent elbow, one forearm and/or one leg to maintain his position. On this play, the defender initially maintains a legal guarding position, but the defender then body checks the dribbler and dislodges him as the dribbler attempts to curl into the paint.

防守方侵入攻方落脚‘领地’(Post Defender "walks under" alighted shooter)

篮下防守犯规之三：防守方‘侵入’已起跳攻方球员身下，未给对方留足落地空间，属防守犯规

Defensive Foul in the post, defender "walks under" airborne shooter

Commentary:

This is an example of a defensive foul for walking under an airborne shooter. A defensive player must always allow an airborne offensive player the space to land. On this play, the post defender maintains a legal, vertical position until he walks into and under the offensive player who is attempting a shot. This body contact to the airborne offensive player is illegal.