Naturally, there is an element of risk involved when players improvise. Although the laws of the game show that there are two halves on the field of play, we, as coaches, tend to divide the field in thirds. The final , or attacking , third of the field is the area in which our teams are able to take risks. The midfield third is the area in which teams prepare to attack and should not be looking to take risks. The defensive third of the field is the area in which teams should be cautious.
Improvisation can result in a loss of possession.
A loss of possession in the defensive third of the field could result in a goal scoring opportunity to opponents. It is much more difficult to create than to destroy. Therefore, a much greater proportion of training should focus upon the techniques and principles of offense. However, it would be a mistake for coaches to neglect to teach the equally important defensive understanding of the game. At the time of possession, the team is geared to offense.