Teams need to be able to think a step ahead of their opponents and not blindly react to their advances.
The best soccer teams in the world have defenders that are constantly talking and, in turn, working as one unit. At the youth level, players learn that the most effective defense is to attack the ball whenever the opportunity presents itself. However, as the skill and strategy level on the pitch improves, the less effective that ideal becomes. Teams need to be able to think a step ahead of their opponents and not blindly react to their advances.