Methodology, data-quality fixes, and how the analysis actually works — written straight from the engineering.
Raw-metric clustering let Federico Valverde and Frenkie de Jong land in the same bucket. That's not a fluke — it's what happens when you cluster event counts instead of playing style.
William Saliba, Virgil van Dijk and Gabriel Magalhães were all classified as full-backs by our own model. The bug wasn't in the players — it was in assuming a centre-back sits dead-centre.
Early versions gave every player the same fifteen sections — a centre-back's report included a shot map built on four attempts all season. The fix was to make the report decide what it should contain.
No jargon. What xG, xT, PPDA, Field Tilt and every other number in a Vision AI report actually mean — for someone who doesn't watch football or read data for a living.