Yanguas/Stupaczuk enter as the higher-ceiling, higher-pace pair: Stupa’s transition speed and counterpunching should amplify Yanguas’ left-side aggression in Valladolid’s typically lively indoor conditions. Guerrero/Leal can compete by slowing rhythm and targeting construction phases, but they’ll need near-perfect first-volley quality to avoid being dragged into Stupa-led scramble points. Prediction: Yanguas/Stupaczuk in 2 sets, with a likely tight second set if Leal’s smash output holds.