TI #009: When Teams get Tired, Football gets Predictable
Timeless Insights #009
Good analysis doesn’t just explain what happened, it gives you a new way to look at the game. By the end of this read, you’ll have a clear way to think about how team structure evolves during a match, and why more movement can still mean less tactical freedom.
Football looks chaotic. Players roam, press, stretch, collapse. But beneath the noise, teams quietly settle into patterns; and this paper shows how and when that happens.
Using full‑match tracking data from a Premier League game, Duarte et al. (2012) treated teams as complex systems, not collections of individuals. Instead of focusing on passes or shots, they tracked how a team’s shape evolved over time: how much space it occupied, how stretched it became, and how regularly those patterns repeated.
What they found is subtle, but powerful.
Teams didn’t become more rigid as matches progressed, quite the opposite. The magnitude of variation increased: teams covered more space, stretched more, and deviated further from their average shape. Yet at the same time, the structure of that variation became simpler. Using approximate entropy, the authors showed that team behaviour grew increasingly regular and predictable within each half.
In plain terms: teams move more, but in fewer ways.
Goals, halftime, and scoreline shifts acted as sharp perturbations. After conceding, teams expanded aggressively; after scoring, they stabilised. But regardless of context, a consistent trend emerged: as fatigue and co‑adaptation accumulated, teams converged toward stable organisational patterns; their preferred tactical attractors.
Modern tracking data is excellent at quantifying effort, but often struggles to quantify intent. We know how much teams move, but we often miss the more subtle dynamic of how constrained that movement has become. As a match wears on, the defining factor is rarely just raw physical output; it is the gradual slide from creative chaos into rigid predictability.
By focusing on this structural tightening rather than just intensity, the paper gives us four concrete takeaways.
