This market resolves YES if Lionel Messi and Cristiano Ronaldo both appear on the match sheet and represent opposing teams in the same match at the 2026 FIFA World Cup.

The match may occur in any stage of the tournament, including:

• Group Stage

• Round of 32

• Round of 16

• Quarterfinals

• Semifinals

• Third-place match

• Final

Resolution Criteria

• Resolves YES if Argentina and Portugal play each other in the 2026 FIFA World Cup and both Messi and Ronaldo are officially listed in the match squad (starting XI or substitutes).

• Resolves NO if Argentina and Portugal never play each other during the tournament.

• Resolves NO if Argentina and Portugal play each other but either Messi or Ronaldo is not included on the official match sheet.
  
  Sources:

  1. Official FIFA match report and official match sheet for the relevant match: FIFA World Cup 2026 Match Centre

  2. Official FIFA competition schedule and results: FIFA World Cup 2026 Fixtures & Results

  3. Official FIFA squad lists (to verify player eligibility if needed): FIFA World Cup 2026 Squads

Fine Print

• Club matches, friendlies, exhibition matches, testimonial matches, and non-World Cup competitions do not count.

• Extra time and penalty shootouts are considered part of the same qualifying World Cup match.

• Official FIFA match records will be used for resolution.