A low block is easy to build and almost impossible to leave

Defending deep is the most teachable structure in football, which is exactly why so many teams get stuck inside it.

Two banks, tight distances, nobody dives in, funnel everything wide. A coach can install that in a fortnight with a group of average players, and it will hold. The problem starts the moment you win the ball.

Because the block is deep, every outlet is a long way from anything. The nearest forward is forty metres upfield and isolated, the wide players have tucked in so far that the touchline is a rumour, and the only pass that exists is a hopeful ball into an aerial duel against a fresh centre back. So you concede possession again within seconds, and the block reforms, and the game becomes a siege that ends the way sieges usually end. Not because the defending was bad. Because the exit did not exist.

This is the part nobody drills, and I think it is the single largest coaching gap in the lower half of most leagues. Teams spend the week on defensive shape and about ten minutes on what happens after the turnover, when it is the second thing that decides whether the first thing was worth anything. A functional low block needs a rehearsed release: a designated first pass, a runner to occupy the space that pass opens, and a rule about when to keep it rather than clear it.

The mid block is the more interesting casualty here. Sitting halfway is theoretically the best of both, close enough to counter and deep enough to be compact, and it is going out of fashion because it requires defenders to defend space behind at speed against forwards who are faster than they used to be. It is hard. So sides collapse to the version that is easy to hold and expensive to escape.

What I would say to any coach choosing the deep option is that you have not chosen a defensive plan, you have chosen an attacking one, and it is a bad attacking plan unless you build the release with the same care you gave the shape.

Get that right and the low block stops being survival. Get it wrong and you will defend brilliantly for eighty five minutes and lose, which is the most common scoreline in football.