Portugal vs Colombia is the Group K match most likely to decide first place, because it puts Portugal's creators against Colombia's transition threat.
Portugal will want long spells of territorial pressure, while Colombia need Luis Díaz and their midfield carriers to attack the spaces left by advanced fullbacks.
Key duel: Bruno Fernandes and Bernardo Silva between lines vs Colombia's midfield duel pressure.
Stakes: Likely Group K control, cleaner knockout positioning, and a direct test of Portugal's title-level balance.
Portugal have the deepest squad, Colombia have the most dangerous counterpunch, and the first match in Houston could shape the whole group.
Portugal enter Group K with elite creators, a deep defence, and the Ronaldo question still hanging over every selection call. This is their tactical path.
For the first time in 20 years, Portugal go to a World Cup without being Ronaldo's supporting cast. Bruno Fernandes leads a genuinely collective team with real title potential.