Every World Cup produces one result that breaks the model. Here are the six most improbable upsets in tournament history, ranked by how badly they defied every reasonable expectation — form, talent gap and historical head-to-head included.
1. USA 1–0 England (1950)
The benchmark. England arrived in Brazil as the self-styled kings of the game; the United States fielded a squad of part-timers, including a hearse driver and a mail carrier. Joe Gaetjens’ diving header in Belo Horizonte produced a result so unlikely that some newspapers assumed the wire score was a typo. Seventy-five years on, no win probability model would have given the Americans more than a sliver.
2. North Korea 1–0 Italy (1966)
Pak Doo-ik’s strike at Middlesbrough eliminated two-time champions Italy in the group stage and sent the tournament’s great unknowns into the quarterfinals, where they led Portugal 3–0 before Eusébio intervened. Italy’s players were met at the airport with rotten tomatoes.
3. Saudi Arabia 2–1 Argentina (2022)
Argentina entered Lusail on a 36-match unbeaten run with Lionel Messi in peak form. Saudi Arabia’s aggressive high line swallowed the favorites after the break, and Salem Al-Dawsari’s winner completed a comeback that statistical models rated among the least likely results ever recorded at a World Cup. The twist that defines it: Argentina recovered to win the whole tournament — the first champion ever to lose its opener.
4. Senegal 1–0 France (2002)
Debutants against the defending champions in the opening match — and Papa Bouba Diop’s scrambled goal held up. France, missing an injured Zinedine Zidane, never recovered: the holders exited in the group stage without scoring a single goal, one of the most complete collapses by a defending champion. Senegal rode the momentum to the quarterfinals.
5. Cameroon 1–0 Argentina (1990)
The reigning champions, with Diego Maradona, lost the San Siro opener to a Cameroon side that finished the match with nine men. François Omam-Biyik’s header, helped by a goalkeeping error, announced African football’s arrival at the sport’s top table: the Indomitable Lions became the first African quarterfinalists that summer.
6. Bulgaria 2–1 Germany (1994)
A quarterfinal, not a group game, which raises the degree of difficulty: Bulgaria had never won a World Cup match before that summer. Hristo Stoichkov’s free kick and Yordan Letchkov’s flying header in three second-half minutes eliminated the defending champions at Giants Stadium — on the same New Jersey site that will host the 2026 final.
Honorable mentions
Japan beating both Germany and Spain to top their 2022 group; South Korea’s 2002 run past Italy and Spain to a semifinal; Morocco becoming the first African and Arab semifinalist in 2022; and Germany’s 7–1 over host Brazil in 2014 — less an underdog win than a statistical event without precedent in a semifinal. Coverage and retrospectives on all of these live on ESPN’s soccer desk. With 48 teams and a larger talent spread in 2026, the transition tactics that fuel upsets — deep blocks, fast counters, set-piece volume — will get more stages than ever.
