Four straight clean sheets and a 14-game unbeaten run make Spain the form team heading into Portugal, yet the hosts arrive on their own nine-match streak without defeat. It is a friendly in name, but the numbers point to a chess match decided by razor-thin margins and—most likely—the first goal. History refuses to pick a side. Across the last 12 meetings, Spain own three wins, Portugal two, and seven have ended level. The most frequent scoreline between them is 0-0, recorded three times—a reflection of how well these neighbors cancel each other out when quality meets caution. Even their recent head-to-heads split the difference: one win each in the last five, plus three draws. Still, Portugal took the last meeting by two goals, a reminder of their punch when moments fall their way. Current form tilts toward La Roja. Spain have won three straight and, crucially, have shut out opponents in four successive matches. That defensive rhythm fuels a critical trend: when Spain lead 1-0 away, they win 100% of the time. Combine that with their 71% rate of winning first halves—compared with Portugal’s 35%—and early control becomes the away side’s blueprint. Portugal’s counters are persuasive. At home, when they go 1-0 up, they close out wins 83% of the time. Even trailing 0-1, they rally to win half of such matches—rare resilience that underlines a squad comfortable playing with the crowd’s energy and pressure. The concern is output: the available data pegs Portugal’s recent scoring at just 0.6 goals per game, the sort of rate that turns any lapse at the back into a decisive swing. Expect a controlled tempo, Spain probing with long spells of possession and layered pressing, Portugal seeking the switch and the set-piece window. Given Spain’s streak of clean sheets and the rivalry’s draw-laden history, a low-scoring script feels most plausible. Prediction outlook: under 2.5 goals remains the value narrative. Spain’s first-half edge and away-game clinching record when ahead 1-0 nudge a narrow away win into view—0-1 Spain—while the weight of stalemates keeps 0-0 or 1-1 firmly in play. For Spain, another shutout would cement their defensive resurgence. For Portugal, disrupting Spain’s early rhythm is the key to flipping the story on home soil.