Zonal marking fails at one specific edge and only there

The scheme handles the crowded middle well, then loses goals at the seam between the last zone and open space.

The argument about zonal versus man marking has been running for thirty years and it is mostly a bad argument, because almost nobody plays either one purely and the goals that get used as evidence are nearly always scored in the same narrow place.

That place is the seam. Every zonal setup covers a defined area with defined bodies, and every defined area has an outer edge, usually somewhere around the far side of the six yard box or just beyond the back post. Inside the zone the system is excellent. A defender attacks the ball from a standing start, facing it, without having to track a runner who is allowed to shove him. The runner has to jump into contact with a man who is already set. That is a good trade and it is why the approach exists at all.

At the edge, the trade collapses. A ball delivered past the last zone is contested by nobody, because the defender at the boundary has been told to hold his area and not chase, while the attacker arriving has a running start and no marker at all. It is the one situation in which the system's discipline works directly against it.

So the interesting question is not zonal or man. It is who owns the edge. Most well organised teams answer with a hybrid, keeping five or six zonal and assigning one or two man markers to the specific opponents who attack that space, and the assignments change opponent to opponent, which is why the shape looks different every week to anyone watching closely.

The part I would push on is the goalkeeper. He is the only player permitted to use his hands and he is frequently the least involved in the design, standing on his line because he does not trust the traffic. A keeper who claims the far post ball removes the edge problem entirely. Most do not, and most are not asked to.

When a goal goes in from a zonal setup, the pundit blames the system and the coach blames the individual. Both are dodging.

Somebody was standing on the boundary and decided it was not his ball. That is where the argument should start.