The players must carry out simple technical exercises (dribbling and changes of direction + oriented ball control) at the beginning of each sequence, without a real cognitive load. They must be ready immediately to win 1 v 1 duels, which of course, require greater awareness (ball mastery + recovery of the space to cover the goal space).
The second part of the exercise increases the difficulty since the players who were involved in the attacking phase must suddenly face a negative transition phase, reducing the available space to the attacking opponents’ couple. The players in possession must overcome the defenders’ line, through wide or deep combinations, to finish in the regular goal (goalkeeper Num. 1).
Transitions and roles are inverted again when defenders win the ball (finishing phase in the opposite goal – goalkeeper Num.12) and when in case of loss of possession (counter-pressing and marking/space coverage + counterattack, if they win the ball back again).
Variation and progression leading to the 3 v 3 duel are, in my opinion, useful for the last of the age group of those I indicated for this exercise, due to the high cognitive load required; above all for the players who started the sequence, carrying out the technical part and the first 1 v 1 duel.