These teams have the talent, form, and favourable matchups to advance deep, potentially upsetting giants like France, Brazil, Portugal, or others in the knockouts.

1. Norway (Group I: France, Senegal, Iraq)
Norway stands out as the most frequently cited dark horse, with strong odds to advance from their group and cause chaos later.

Why they can shock giants:
- Erling Haaland leads a potent attack, supported by playmakers like Martin Odegaard. They also have depth with Alexander Sorloth and others.
- Perfect qualifying record (one of few teams worldwide) shows consistency under coach Stale Solbakken.
- Group is tough (France is a favourite), but they should top or advance comfortably against Iraq and Senegal. In knockouts, their transition game and Haaland's finishing make them nightmare opponents for anyone.

Many analysts see them reaching quarter-finals or further - nobody wants to face them post-group stage.

2. Colombia (Group K: Portugal, DR Congo, Uzbekistan)
Colombia has exciting attacking firepower and momentum, evoking their strong 2014 run to he quarter-finals.

Why they can shock giants:
- Star attackers: Luis Diaz (in top form at Bayern), James Rodriguez (veteran creator), Luis Suarez (still scoring for Sporting), plus Jhon Duran (FC Krasnodar) and others. This is one of the deepest attacks among non-favorites.
- Solid recent form, including strong CONMEBOL qualifying.
- Favorable group - they should finish 1st or 2nd (Portugal is the main rival). A good group result sets up favourable knockouts.

They have the tools to do well if the attack clicks.

3. Morocco (Group C: Brazil, Haiti, Scotland)
The 2022 semi-finalists (first African team to reach that stage) remain dangerous with experience and squad depth.

Why they can shock giants:
- Proven giant-killers: Beat Belgium, Spain, and Portugal in 2022.
- Talented squad with European-based players like Achraf Hakimi, Brahim Diaz) and strong defense/organization.
- Group includes Brazil (tough) but winnable games against Haiti and Scotland. They could top the group or advance and cause more upsets.

They are battle-hardened and could reach quarter-finals or semis again.

4. Japan (Group F: Netherlands, Sweden, Tunisia)
Japan is a consistent over performer with tactical discipline and rising stars.

Why they can shock giants:
- Recent wins against strong European sides (beat England in friendlies).
- High-pressing style under Hajime Moriyasu, blending youth (Takefusa Kubo) and experience (Wataru Endo).
- Manageable group - capable of advancing and then upsetting bigger teams in knockouts, as they've done before.

They aim to go beyond the Round of 16 for the first time.

5. Ecuador (Group E: Germany, Ivory Coast, Curacao)
Ecuador is a defensive powerhouse and one of the most overlooked threats.

Why they can shock giants:
- Elite defence: Conceded very few goals in qualifying (just 5 goals in 18 matches), with stars like Moises Caicedo (Chelsea), Piero Hincapie (Bayer Leverkusen), and Willian Pacho (PSG).
- Unbeaten in long stretches recently; strong CONMEBOL campaign.
- Group has Germany as favourite, but they can grind out results and advance, then be tough for anyone.

Their organization and counter-attacking make them ideal for upsets.

Amad Diallo fires Ivory Coast to historic France upset in World Cup warmup