Two unbeaten runs collide as Portugal host Spain, but it is Spain’s defensive steel that dominates the narrative. La Roja arrive on a 14-game unbeaten streak and four consecutive clean sheets, the kind of form that tilts finely balanced fixtures. Add a three-match winning run and a 71% first‑half win rate, and Spain have been starting fast and shutting the door early. Portugal’s form is sturdy in its own right: nine matches unbeaten and a home profile that speaks to resilience. When the Seleção lead 1-0 at home, they convert 83% of those matches into victory; even when trailing 0-1 at home, they still come back to win 50% of the time. Those numbers warn that the contest will remain live regardless of the first punch. Head-to-head history backs a tense script. Across the last 12 meetings, Spain lead narrowly (3 wins) over Portugal (2), with seven draws in between. The most common result is 0-0, recorded three times, and five of the last five encounters produced one win apiece with three draws—another signal of fine margins. Portugal did take the last meeting by two goals, a reminder that one clinical moment can swing the rivalry. Spain’s away profile is decisive: when they lead 1-0 on the road, they win 100% of the time. That amplifies the value of the opening goal, especially given Spain’s current streak of clean sheets. On Portugal’s side, a recent scoring dip—0.6 goals on average—raises questions about their cutting edge against elite defenses, even if their home resilience remains a powerful counterweight. The tactical balance points toward a controlled, low-scoring duel. Spain’s superior recent five-match performance and first‑half edge suggest they could dictate early territory and tempo, forcing Portugal into transitions. Yet Portugal’s capacity to endure, their comeback record at home, and the rivalry’s draw-heavy history argue against a runaway. Expect a game decided by details: set‑pieces, a single break, or a rare defensive lapse. Prediction: draw with a lean to Spain by a single goal if they strike first. Likely scorelines include 0-0, 1-1, or 0-1. Either way, the first goal should define the night.