Set up 2 x equal channels in the centre of the field. Simple in and out ball from attacker to defender starts ball 1. Play out the full 1 v 1. Ball 2 is a "free hit" attacker works back to the ball, the defender must be 5m before defending when the "free hit" is taken.

To work on attacking ability to beat a defender. React for ball 2 and work the defender over. For the defender to be mobile and win ball 1. For ball 2 having the knowledge to stay 5m before engaging and how to engage when it's from here.

You can extend and progress this exercise by making the zones bigger or smaller which will give more advantage to the attacker or defender. You can also change the position of the channels to work a different area of the field.