The Portugal vs. Spain match in the Round of 16 of the 2026 World Cup is expected to be one of the most evenly matched matches. My prediction: Spain 2-1 Portugal (after 90 minutes, or could go to extra time if the score is tied). Probability of winning: Spain: 55% Portugal: 45% Reason: Spain typically has the upper hand in possession and collective play. Portugal possesses extremely dangerous individual qualities and is capable of punishing opponents' mistakes on the counterattack. If Portugal can maintain discipline and be effective in transition, they also have a good chance of qualifying.