TacticsPage

There is a moment in Liverpool's 3-1 win over Brentford in January that most broadcasters missed entirely. Trent Alexander-Arnold had drifted into a central position — a deliberate, coached movement — and the camera had already panned to track the ball. What remained off-screen was the question that would define the next decade of football tactics: what exactly is a full-back now?

The answer, if you spend enough time with the positional data from the last three Premier League seasons, is that the full-back has become the most intellectually demanding role on the pitch. Not the most physically demanding — that remains the pressing midfielder, the one who covers 13.4 kilometres in ninety minutes and still finds the energy to press a centre-back at the eighty-third. Not the most technically demanding — that is almost certainly the deep-lying playmaker who must receive under pressure in tight spaces and immediately distribute with purpose. But the full-back must now be all of these things, in sequence, sometimes simultaneously, while also reading the defensive shape of the team they're leaving exposed behind them.

Pep Guardiola understood this before anyone else. When he first moved Philipp Lahm into midfield at Bayern Munich in 2013, the football world treated it as an eccentric experiment. It was, in retrospect, a glimpse of the position's future. The full-back was being asked a new question, and the teams that answered it first would dominate possession football for the next decade.

But here is where the analysis gets genuinely strange, and where I think most tactical commentary has been too conservative in its conclusions...

My grandfather watched the 1986 Superclásico from a bar in La Boca with seventeen other men, none of whom he knew before that afternoon, all of whom he embraced like brothers before the second half. He described it to me once as the most alive he had ever felt in a public space — more than any election, any concert, any protest march. And he had attended all three of those things in a country where each of them carried genuine risk.

I think about this story whenever I try to explain to people who didn't grow up in Buenos Aires what the Superclásico actually means. It is not, as the travel guides suggest, simply a fierce local derby. It is not, as the sociologists suggest, merely an expression of class conflict — though the class geography of the two clubs is real and documented and still matters in ways that are too easily dismissed by people who have never lived it. It is something stranger and more essential than either of those descriptions captures.

The Superclásico is a recurring argument about what kind of city Buenos Aires is. Not was. Is. Present tense, every time the fixtures are announced, every time the squads are named, every time the bus routes from Palermo to Núñez are rerouted to manage the crowds. The city becomes, for approximately ninety minutes, a place that must decide which version of itself it believes in.

Boca Juniors represents — and I am aware of how reductive this sounds, and I will complicate it shortly — the city as port, as arrival, as the place where the boats came in from Genoa and Naples and later from the Levant and Eastern Europe, carrying people who had nothing and built something and whose grandchildren now fill La Bombonera and sing songs in a dialect that has been evolving for a hundred and twenty years.

River Plate represents the city as aspiration — the move from La Boca to Núñez that their founders made in 1923, which was and was not about money, which was and was not about class, and which the Boca supporters have never forgiven or forgotten, because in Buenos Aires the geography of ambition is something you carry in your body.

But here is what the simple version of this story always misses, and what I spent three weeks in Argentina last summer trying to understand properly...