Mexico enters the 2026 FIFA World Cup as Group A favorites and co-hosts with strong home support in Mexico City, recent Concacaf success, and depth across attack and defense that aligns with their 57.5% implied probability to top the group. South Korea follows at 20.5% thanks to an unbeaten qualifying run, experienced campaigners like Son Heung-min, and solid squad quality that positions them competitively for second. Czechia at 17.5% benefits from a return after two decades away and steady UEFA form, while South Africa trails at 6.2% as the lowest-ranked side facing a steep challenge in a group featuring three more established nations. The opening matches today provide the first live tests of these dynamics.