To provide a definite purpose for all to deliberately focus on.

Assume the opposition has the ball in midfield.

It is the role of the Halves & Full Backs to get the ball.

To achieve this the Midfielders and sometimes the Strikers need to help by pushing back and putting pressure on the opposition. The engaging Defender must hold while their team mates provide cover.

Once cover is on, the opponent must be channelled wide and encouraged to loose procession of the ball by mistake (tackle at this moment) or by taking ball over the back line.

If channelling fails and the opponent approaches the circle then a tackle must be put on, before they enter the circle.

Once we have the ball - usually a 16 yd hit - so in the case of:-

Full Back is to get ball to same side Inner either directly (esp. if hit taken quickly) or via Halves.

Inner is to get ball to Striker unless difficulty or congestion arrises in which case, ball is to be switched via Centre Half or other Inside.