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Photo: Foot Mercato
The rule that keeps wrecking World Cup dreams
Another World Cup knockout game, another red card under the same regulation — and another nation heading home earlier than they should have. Ecuador's Piero Hincapié was sent off during a 2-0 defeat to Mexico in the round of 32 on 30 June, dismissed under what has become the tournament's most talked-about rule: the so-called Prestianni rule. Mexico progress. Ecuador are out. And FIFA's rulebook is, once again, the main character.
What is the Prestianni rule?
The rule takes its name from an incident earlier in the tournament involving Argentine forward Claudio Prestianni, whose challenge — deemed to endanger an opponent through reckless force applied above the knee on a stationary player — was retrospectively reviewed and punished with a red card under a FIFA directive introduced ahead of the 2026 tournament. The directive, confirmed by BBC Sport, instructs referees to apply a mandatory dismissal for any challenge classified as "endangering the physical integrity" of an opponent where the primary point of contact is the lower leg or ankle of a player who has no realistic chance of playing the ball. In plain terms: if you lunge at a player who isn't going for the ball and make contact below the knee, you're off — no discretion, no yellow-card option.
Hincapié's dismissal is the second high-profile application of the rule in the knockout stage, and Ecuador's exit means the debate is no longer a footnote. It's the story.
Why this one stings
Hincapié is one of South America's most reliable defenders — a Bayer Leverkusen regular who has been central to Ecuador's defensive structure throughout this World Cup. Losing him mid-match against Mexico, in a knockout tie where margins are everything, effectively ended the contest. The 2-0 scoreline tells you what happened next.
Ecuador's campaign is over. Mexico move on. And the manner of it — a red card under a rule that a significant portion of the watching world is still getting to grips with — leaves a bitter taste that a clean defeat simply wouldn't.
A tournament defined by its rulebook
The 2026 World Cup was always going to be historic — 48 teams, new format, expanded knockout rounds. But the Prestianni rule is threatening to become its defining controversy, and not in the way FIFA would want. When a regulation is named after a single incident and then proceeds to shape the outcomes of multiple knockout ties, the question isn't just whether the rule is being applied correctly. It's whether the rule should exist in the form it does at all.
FIFA has not publicly addressed the growing criticism of the regulation's application at this tournament. That absence from the conversation is doing no favours.
What happens now
Mexico advance to the quarter-finals, and fairly or not, the manner of their progression will follow them. Ecuador's players and staff will feel — with some justification — that the rulebook took more from them than their opponents did.
The Prestianni rule has now become one of those tournament-within-a-tournament stories: the kind that runs alongside every result, waiting for the next flashpoint. With the quarter-finals approaching, it probably won't have to wait long.
Sources1 source
Flagside's editors read every piece we publish. We work from the football press, write our own copy rather than reprinting anyone's, and check each article for accuracy and sourcing. Every outlet that fed into this piece is named under Sources.
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