Spain travel to Split on Tuesday needing only a point to confirm their Nations League quarterfinal place, carrying a 41-match unbeaten streak and a perfect nine points from three Group A3 fixtures. Croatia, sitting third on three points, are wounded — their 0-7 demolition by England was the heaviest defeat in the nation's history and the kind of result that forces uncomfortable questions about a squad built around ageing legs. The generational subplot writes itself. Lamine Yamal, 17, is the joint leading scorer in this year's Nations League with four goals in three games, including a brace against Croatia in Seville. He has scored in every group match. Luka Modric, 41, remains Croatia's captain and midfield architect, still finding the net once this campaign, but the gap between what he represents and what Yamal is becoming is the story of international football in 2025. Spain's attack has been ruthlessly distributed — 10 goals from seven different scorers across three matches. Alex Baena has added two assists and a goal from midfield. This is not a team dependent on one channel. Croatia, by contrast, lean on Modric and Ivan Perisic (two assists) in ways that expose their lack of depth when the veterans are contained. Croatia's squad is thinning. Centre-back Martin Erlic is injured until mid-October, and Josip Juranovic is unavailable through illness. Spain have their own concerns — Nico Williams, Ferran Torres, Alejandro Grimaldo, and Joan Garcia are all doubtful — but the depth disparity is the point. Spain can rotate and still field a side that would be favourites against almost anyone in Europe. The head-to-head record underlines the mismatch: 12 meetings, seven Spanish wins, three Croatian, two draws. Croatia's recent form reads L-L-W-L-W. Spain's reads W-W-W-W-W. Stadion Poljud will be loud and partisan, but noise doesn't close a talent gap this wide. The Nations League format gives the match structural stakes even if the emotional narrative is lopsided. Top two in each League A group advance to March 2027 quarterfinals. Spain are through or nearly so. Croatia need results to avoid being pulled into a relegation conversation, which for a team that reached the 2022 World Cup semi-finals would be a jarring indignity. This is a match worth watching not for competitive uncertainty but for the craft on display — the last years of one of football's great midfielders overlapping with the first years of what looks like another. The scoreline may be predictable. The individual performances won't be.