For defending throw-ins consider the grid above. All defenders should rotate to the ball & be in one of the 4 squares closest to the ball.

Right defender with the ball


(above) The opponent’s Right Defender has won the ball. Note how the defense rotates to the ball. The open space is over the top of the defenders, but that space is covered by the sweeper/keeper. The Left Forward is left in open space because that diagonal pass, which is about 50 yards in the air, is extremely difficult to place when the defensive pressure is so great. In addition, the pass would be very difficult to control. Our Right Midfielder would run down the defender if the pass were successful.