Biggest Potential Upsets at World Cup 2026 — Shock Results

Every World Cup delivers moments that defy logic. Saudi Arabia beating Argentina in 2022. Germany losing to South Korea in 2018. Cameroon stunning Argentina in 1990. The beautiful unpredictability of knockout football is what makes the World Cup the greatest sporting event on Earth. The 2026 edition, with its expanded 48-team format, is primed to deliver more upsets than ever before.

Why Upsets Happen

World Cup upsets are not random. They follow predictable patterns:

Complacency from favorites: Teams expected to win comfortably sometimes fail to prepare with full intensity for “lesser” opponents. Early-tournament matches are particularly dangerous because the tournament rhythm has not yet been established.

Motivation asymmetry: For a team like Saudi Arabia or Cameroon, beating a World Cup favorite is the pinnacle of their football history. For the favorite, it is “just another game.” This motivation gap is powerful.

Tactical preparation: Underdogs have weeks to prepare for one specific opponent. They study every weakness, drill specific plans, and execute with discipline that favored teams do not always match.

Physical conditions: Heat, altitude, and jet lag affect all teams differently. A European power playing an afternoon match in Houston (95°F, 90% humidity) faces a physical challenge that a Central American team handles routinely.

The expanded format: With 48 teams, the quality gap between the best and worst teams in the tournament is wider than ever. But paradoxically, this also means more underdogs with nothing to lose and everything to gain.

Group Stage Shocks

Our predictions for the most likely group stage upsets:

1. An African team beats a European top seed Probability: 70%. This happens at almost every World Cup. Nigeria, Morocco, Senegal, or Cameroon beat a team like Germany, Netherlands, or Belgium. African teams combine athleticism, technical skill, and the fearlessness of teams who believe they have nothing to lose.

2. A Central American team beats a South American giant Probability: 40%. Costa Rica beat Japan and drew with Germany in 2022. Honduras or Panama could produce a similar shock against a South American team playing its first match of the tournament.

3. A World Cup debutant wins a match Probability: 60%. The expanded field means several nations will be at their first World Cup. The energy and adrenaline of playing on the biggest stage can produce performances that exceed normal ability levels.

4. A European top-10 team loses to an Asian opponent Probability: 50%. Japan’s victories over Germany and Spain in 2022 were not flukes. Japan, South Korea, and even emerging teams like Uzbekistan or Indonesia can trouble European sides with speed and organization.

Knockout Round Surprises

The Round of 32 (new for 2026) is the most upset-prone stage:

Why: Third-placed group teams who barely qualified are desperate and dangerous. First-placed group winners may underestimate them. The single-match elimination format means one bad 90 minutes ends your tournament.

Predicted knockout upsets:

• A strong African team (Morocco or Nigeria) beats a European power in the Round of 16, following Morocco’s 2022 blueprint of defensive discipline and counter-attacking
• An Asian team (Japan) reaches the quarterfinals by beating a South American side
• The USA, riding home advantage, beats a higher-ranked opponent in the quarterfinal

Teams Most Vulnerable

Germany: The four-time champions have a track record of early exits. They were eliminated in the group stage in both 2018 and 2022. Despite a revival at Euro 2024, Germany’s tournament consistency is questionable.

Portugal: Post-Ronaldo transition creates uncertainty. Portugal have the talent but may lack the leadership and experience to navigate a difficult group without their all-time record scorer driving them forward.

Belgium: The “golden generation” of Hazard, De Bruyne, and Lukaku is aging out. Belgium in 2026 could be a team in transition, vulnerable to organized opponents who press their aging midfield.

Spain: Paradoxically dangerous because they are so young. Spain’s talented under-23 squad could be brilliant or could crumble under World Cup pressure. Young teams are inconsistent by nature.

Argentina: The defending champions face the “champion’s curse.” Every opponent raises their game against the title holder, and the emotional letdown after winning the 2022 World Cup is a real phenomenon.

The 48-Team Upset Factor

The expanded format changes the upset calculus in several ways:

More first-round matches against weaker teams: Top seeds may become complacent if they crush their first two group opponents and then drop intensity for the third match.

Third-place advancement reduces desperation: In the old 32-team format, losing one group match could be fatal. In the 48-team format, even a loss still leaves a team with a good chance of advancing as a third-placed team. This reduces the do-or-die urgency that sometimes motivates underdogs.

More countries, more storylines: Teams from nations without World Cup pedigree carry enormous national pride. A team from, say, Indonesia or New Zealand performing above expectations would dominate global headlines and draw massive support from neutrals.

Our boldest upset prediction: A team ranked outside the top 30 reaches the quarterfinals of the 2026 World Cup. Whether it is an African, Asian, or CONCACAF team, the expanded format provides the space for one genuine surprise package to capture the world’s imagination — just as Croatia did in 1998, South Korea in 2002, and Morocco in 2022.

The 2026 World Cup will be full of surprises. The only prediction we are 100% confident in: at least one result during the tournament will leave the football world speechless.