Every World Cup produces a team that goes further than anyone expected, and the 2026 tournament, with its expanded field and new route through third place, looks tailor-made for another surprise run. The favourites will dominate the headlines, but the history of the tournament is full of underdogs who reached semi-finals and finals by being organised, resilient and fearless at the right moments. Spotting the dark horses early is part of the fun of following a World Cup.

This guide looks at what makes a dark horse, profiles the teams with the strongest claims to that label in 2026, and explains why the new format helps outsiders more than ever before. It is not a prediction, because World Cups rarely follow predictions, but a guide to the teams worth watching when the favourites are not playing.

A dark horse is not simply a weak team that gets lucky. The classic dark horse has a clear identity, a settled squad that has played together for years, a coach with a plan that suits knockout football, and at least one player capable of deciding a tight match. Crucially, dark horses are usually hard to beat rather than spectacular: they defend well, stay compact, and punish opponents who underestimate them. In a tournament where a single goal can end a campaign, being hard to beat is often more valuable than being beautiful to watch.

The other ingredient is momentum. A dark horse often arrives at the World Cup after a strong qualifying campaign or a good run at a continental championship, with confidence high and expectations low. Low expectations are an advantage: the pressure sits with the favourites, while the underdog can play with freedom. When a dark horse wins its first knockout match, belief grows quickly, and by the quarter-finals, a team that started the tournament as an afterthought can feel like it belongs among the elite.

Croatia is the benchmark for modern dark horses: finalists in 2018 and semi-finalists in 2022, despite a population smaller than many major cities, built on a golden generation of technically gifted players and a habit of winning penalty shootouts. Morocco provided the most recent shock, reaching the semi-finals in 2022 with an organised, intense and fearless team that beat several traditional powers along the way. Both teams show that a clear plan and a united squad can overcome a gap in individual star power.

Beyond those two, look for teams that combine a strong defensive record with a reliable goalscorer, that qualified comfortably rather than scraping through, and that have experience of winning knockout matches at continental level. Teams from Africa and Asia have closed the gap on the traditional powers in recent tournaments, and the expanded field gives more of them a platform. A team that finishes second or even third in its group can still build momentum through the new Round of 32, and from there, the difference between a quarter-final and a semi-final is often one match, one goal and one moment of nerve.

The 48-team format helps underdogs in two specific ways. First, the route through third place means a slow start no longer ends a campaign: a team can lose its opening match, recover, and still reach the knockout stage, where the tournament effectively restarts. Second, the extra knockout round means more matches between favourites and outsiders, and in a single-elimination tie, the underdog only needs one good day to produce a shock that would be impossible over a longer series.

For fans, the advice is simple: do not only watch the favourites. Pick an underdog whose story appeals to you, follow its group, and enjoy the ride, because the best World Cup memories often come from the teams nobody expected. The favourites may lift the trophy in the end, and usually they do, but the dark horses are the teams that make the tournament feel alive, unpredictable and worth watching from the first group match to the last.