At 2,240m above sea level, Estadio Azteca is the most tactically impactful venue in the tournament. High-pressing teams face a 15-minute reduction in pressing sustainability. The ball travels faster and dips less, affecting crossing accuracy. Teams drawn to play in Mexico City must adapt their game plan or suffer the consequences.

Without Ronaldo's gravitational pull, Portugal has rebuilt as a fluid attacking unit. Leão's pace, Bruno's creativity, and Bernardo's intelligence create a more balanced threat. Martínez has shifted from target-man service to positional play — the question is whether Portugal can generate enough goals without their all-time scorer.

Under Luis de la Fuente, Spain has rebuilt its possession game with wider build-up patterns and more directness through the half-spaces. Yamal and Nico Williams provide genuine pace on the wings — something Spain's tiki-taka era never had. The question is whether Rodri's fitness allows the deep pivot that makes it all work.