Pressuring the ball
Putting pressure on the ball doesn’t always mean running in for a tackle. Simply having a defender in front of the ball limits the attacker in many important ways. In your own defensive third, make sure to stay between the attacker and your own goal. In the middle of the field, approach the attacker at angle so you can “shepherd” him toward the sideline.

First and second defender rule
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The is how defenders should rotate when one of them misses a tackle. The defender who was beaten immediately drops back to the center of defense while the second defender steps up to the ball.

Closing down passing lanes
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Defenders can sometimes limit the the attacker by closing his passing options. As the diagram shows, attacker “a” is challenged by a defender who blocks his passing lane to attacker “b”. This forces attacker “a” to move sideways. Usually, you want to force your opponent out to the sideline. One exception is when you are near the opponent’s goal. In that case, it’s better to force him towards the middle, on top of his own box.

Marking
The closer an opponent is to the ball, the tighter you should mark him. This way, you can intercept and fight for the ball when he is about receives a pass. Never wait for the person you are marking to receive the ball. Try to beat him to the ball, especially if you are faster.

clearing

Clearing
Clearing the ball is useful when the attackers have built up momentum or when they have a numerical advantage. Don’t hesitate to kick the ball out of bounds in order to delay the attack.
Experienced defenders can use their smarts to clear the ball. For example, when close to the sideline, you may try and kick the ball at the attacker’s knees so that it’s deflected for a throw-in.