Has the World Cup Become Less Unpredictable Over Time?

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North Korea beat Italy 1-0 at the 1966 World Cup. Cameroon beat Argentina in the 1990 opener. Senegal stunned France in 2002. Saudi Arabia demolished Argentina 2-1 in 2022. The fairy-tale upset is the World Cup’s most powerful narrative, and every four years the question resurfaces: are these shocks becoming rarer as money, data, and global scouting close the gap between football’s haves and have-nots? Or does the tournament’s unique pressure cooker — single matches, neutral venues, exhausted players at the end of long seasons — ensure that chaos remains baked into the format?

I have a stake in this question beyond intellectual curiosity. As someone who analyses tournament betting markets for a living, the answer directly affects strategy. If the World Cup is becoming more predictable, punters should back favourites aggressively and accept lower returns. If unpredictability is stable or increasing, the value lies in contrarian positions and upset-side bets. The 2026 tournament — the first with 48 teams — forces this debate into sharper focus than ever.

When Underdogs Ruled: The Golden Era of World Cup Shocks

Between 1950 and 1990, the World Cup was a genuinely open competition in ways that are difficult to appreciate from a modern vantage point. The USA beat England 1-0 at the 1950 tournament in Brazil — a result so improbable that English newspapers initially assumed the score had been transmitted incorrectly. West Germany, trailing 0-2 to Hungary in the 1954 final, won 3-2 in what remains one of the greatest upsets in sporting history. North Korea’s elimination of Italy in 1966 came against a backdrop where scouting reports on Asian football were essentially nonexistent in Europe.

What made this era unpredictable was not the absence of quality — Brazil, Germany, Italy, and Argentina were dominant forces — but the absence of information. Coaches prepared for opponents they had never seen play. Players encountered tactical systems they had no framework to decode. Physical conditioning varied wildly between confederations, and travel fatigue in an era of propeller planes and multi-day journeys compounded the uncertainty. The playing field was not level, but it was opaque, and opacity breeds upset.

The financial dimension mattered less than it does today. Club football had not yet undergone the commercial explosion that now concentrates the world’s best players in a handful of wealthy European leagues. South American, African, and Asian leagues retained more of their talent, which meant national teams from those confederations fielded players in their prime rather than the mix of European-based stars and domestic-league supplementary players that characterises modern World Cup squads outside Europe.

By 1990, when Cameroon’s Roger Milla danced his way past Colombia and England at age 38, the golden era was fading. Television coverage had globalised the sport. The 1990 tournament in Italy was the first where every national team coach had access to video analysis of their opponents. The information asymmetry that powered earlier upsets was shrinking, and with it, the structural advantage that underdogs had enjoyed: the element of surprise.

Money, Data, and the Professionalisation of Everything

The 1992 inception of the Premier League and the 1995 Bosman ruling transformed European club football into a global talent magnet. Within a decade, the best players from every continent were concentrated in the top five European leagues, training at world-class facilities, playing in the most competitive matches weekly, and developing at a pace that players in domestic leagues elsewhere could not match. By the 2006 World Cup, the gap between European-based players and the rest was measurable and growing.

For national teams, this created a paradox. Countries like Japan, South Korea, Côte d’Ivoire, and Nigeria now supplied players to elite European clubs, which should have strengthened their World Cup squads. And it did — but it strengthened the traditional powers even more, because their entire squads trained at elite level, while emerging nations fielded a mix of European-based stars and domestic-league players whose preparation gap was often visible on the pitch.

Simultaneously, data analytics arrived in international football. By 2014, every World Cup team had access to statistical scouting reports, GPS tracking data, and video analysis platforms that would have seemed science-fictional twenty years earlier. The unknown opponent — the foundation of the golden-era upset — effectively ceased to exist. When Belgium prepared for Japan in the 2018 Round of 16, they had granular data on every Japanese player’s movement patterns, pressing triggers, and defensive vulnerabilities. They still nearly lost, falling 0-2 before winning 3-2, which suggests that data reduces surprises without eliminating them.

The financial gap between World Cup teams has widened into a canyon. At the 2022 World Cup, the aggregate squad market value of the 32 participants ranged from roughly A$2.1 billion (England) to A$15 million (Costa Rica). That 140-to-1 ratio in squad value did not exist in 1990, when the gap between the wealthiest and poorest squads was perhaps 10-to-1. The 2026 tournament, with the addition of smaller nations like Curaçao, Haiti, and Cape Verde, will produce an even wider spread. Financial disparity predicts outcomes more reliably than any other single variable, and financial disparity has never been greater.

Qatar 2022: Did It Disprove the Predictability Theory?

If you stopped reading at the previous section, you would conclude that the World Cup is now a foregone conclusion for the wealthy and that underdogs are statistical footnotes. Then Qatar 2022 happened, and it threw a grenade into that narrative.

Saudi Arabia’s 2-1 victory over Argentina in the group stage was not a fluke born of ignorance — it was a meticulously prepared tactical ambush. Hervé Renard’s team executed an absurdly high defensive line that caught Argentina offside 13 times, pressed relentlessly for 20 minutes in the second half, and scored twice from well-rehearsed attacking patterns. Japan beat Germany 2-1 and Spain 2-1 using similarly specific tactical plans that exploited their opponents’ structural weaknesses. Morocco reached the semi-finals by conceding one goal in open play across the entire tournament, eliminating Belgium, Spain, and Portugal through defensive organisation that no amount of opponent data could crack.

The lesson of 2022 was not that underdogs are back. It was that the nature of upsets has changed. In the golden era, underdogs won through surprise and chaos. In the modern era, they win through preparation and structure. The information revolution that was supposed to make outcomes more predictable has, counterintuitively, given well-coached underdogs the tools to prepare ambushes that their predecessors could never have conceived. Saudi Arabia knew exactly how Argentina’s offside trap worked because the same video analysis available to Lionel Scaloni was available to Hervé Renard.

The 2022 upset rate — defined as matches where the lower-ranked team won — was approximately 31% in the group stage, compared to 28% in 2018 and 25% in 2014. The trend line, if three data points constitute a trend, points upward. But whether this reflects a genuine structural shift or tournament-specific noise (2022’s unique winter timing, compact geography, and the Saudi Arabia anomaly) is genuinely unclear. What I can say with confidence is that the theory of increasing predictability took a significant hit in Qatar and has not recovered.

What 48 Teams Mean for Unpredictability in 2026

The 2026 World Cup expands from 32 to 48 teams, introducing nations that have never competed at this level and widening the quality gap between the strongest and weakest participants. Intuitively, this should make the tournament more predictable: Brazil versus Haiti is not a competitive fixture by any measure. But the expanded format also introduces structural features that could increase chaos.

Four-team groups with only two guaranteed qualification spots (plus eight best third-placed teams) mean that a single upset can transform a group’s dynamics entirely. At a 32-team World Cup with three group matches, a top seed who loses their opener has two matches to recover. At a 48-team World Cup with the same three-match group format, the maths is identical — but the presence of a weaker fourth team creates a false sense of security. Favourites may rest players against perceived easy opponents, and rested players against motivated debutants is a recipe for the kind of upsets that Saudi Arabia demonstrated in 2022.

The travel factor is unique to 2026. Matches are spread across the USA, Mexico, and Canada, with some groups requiring flights of five or more hours between venues. European and South American squads accustomed to compact tournament geography in Qatar and Russia will face logistical challenges that create fatigue, disrupt preparation, and introduce the kind of unpredictable variables that statistical models struggle to capture. A team playing in Houston on a 35-degree afternoon three days after playing in Vancouver is not the same team their qualifying xG suggests.

Expanded youth tournaments offer the closest parallel. When the FIFA U-20 World Cup moved to 24 teams, the group-stage upset rate increased modestly but measurably. Debutant nations, playing without pressure or expectation, produced results that defied ranking-based predictions at a rate roughly 8% higher than in the smaller-format tournaments. If this pattern holds at senior level — and there is no guarantee it will, given the vastly higher stakes — the 2026 group stage should produce more upsets than 2022, not fewer.

The Betting Lesson From 92 Years of World Cups

Here is what the historical record actually tells us, stripped of narrative and nostalgia. The World Cup has not become significantly more or less predictable over the past three decades. The nature of unpredictability has shifted — from chaos-driven to preparation-driven — but the aggregate upset rate has remained remarkably stable, fluctuating between 22% and 32% across the group stages of every tournament since 1998. The favourites still win more often than not. The underdogs still produce enough shocks to destroy multi-bets and generate headlines. The gap has not closed, but it has not widened into a chasm either.

For punters approaching the 2026 World Cup, this means two things. First, do not assume that the expanded format makes favourites safer. More teams introduces more variables, more mismatches in both directions, and more opportunities for tactical ambushes by well-prepared underdogs. Second, do not assume that 2022’s upset bonanza was the new normal. Qatar’s results were partially structural (the winter timing, the compact geography) and partially idiosyncratic (Saudi Arabia’s specific tactical plan, Morocco’s generational defensive unit). The 2026 tournament will produce its own upsets on its own terms, and the best preparation is not to predict which shocks will occur but to structure your betting so that a few shocks do not destroy your entire tournament position.

The World Cup remains gloriously, stubbornly unpredictable — not because the gap between teams is closing, but because the format itself, with its short time horizons, winner-take-all matches, and pressure that no club competition can replicate, guarantees that form guides and rankings are suggestions, not certainties. That is what makes it the greatest sporting event on earth, and that is what makes it the most humbling market for anyone who bets on it.