The hour-mark substitution is a habit, not a decision

Managers make changes at 60 minutes with such reliability that you could set a watch by it, and the clock is rarely why.

Look at when substitutions happen across a weekend of fixtures. There is a cluster around the hour and another around 75 minutes, and it is far too tidy to be a response to what is happening in individual matches. Eleven different games, eleven different states, one shared reflex.

Some of it is legitimate. The three-window rule pushes changes into batches, so a manager who wants to make three changes has to make them together or waste a window, and 60 minutes is a defensible compromise between too early and too late. Fine. But the tidiness goes beyond that, and what it mostly reflects is that substitutions get planned on Friday rather than decided on Saturday.

The cost shows up in a specific and repeated way. A side is drawing at 58 minutes, the striker is having a poor game, and he comes off on schedule. Two minutes later the opposition centre-half, who had spent an hour struggling with that striker's movement, is now facing somebody entirely different and gets a fresh start himself. The substitution intended to solve a problem also solved one for the opponent.

Or the reverse, which is worse. A team is winning, comfortable, entirely in control of a game, and a manager makes two changes for game-management reasons at the hour. The rhythm goes. The two players introduced are not in the flow of the match, the shape shifts by a few metres, and the momentum swings for reasons nobody can point at afterwards. Anyone who watches football regularly has seen this specific collapse a dozen times, and it gets attributed to complacency rather than to the intervention that caused it.

There is also the question of who comes off. The convention is that the tired man goes, which sounds obvious and often is not. Sometimes the right change is to remove the player who is fine but whose role has been neutralised, and keep the exhausted one whose mere presence is occupying two defenders. Fatigue is visible. Tactical redundancy is not, and only one of them gets acted on.

What I would like to see, and never will, is a manager explaining a match where he made no changes at all until the 80th minute because the eleven on the pitch were doing exactly what he wanted. That would be a real decision. It would also be portrayed as passivity, as a manager who did nothing, and no one in the job needs that particular headline.

So the hour-mark reflex survives, defended on grounds of freshness, and rarely examined.