We understand as an interception line, the line between the ball and the attacking opponent that is in our zone with options to receive. The defender must not mark the player, nor eliminate the spaces of the possessor, but his mission is to "cut" the passing line without leaving his playing area.
In this way, and without having to leave the defensive zone itself, the players can avoid that the opponent is in a position to receive the ball, positioning themselves so that they can "cut" the line of pass.
In this way it will not be necessary neither an intense marking on the opponent, nor an accumulation of players in the area of the ball.
We call these variants and defensive forms "SMART MARKING".
Consequently with what has been said at this point, we understand that we can only achieve defensive success (avoid the completion of the opponent / recover the ball), if we take advantage of their offensive errors.