Yanguas/Stupaczuk arrive as the higher-ceiling pair: faster to the net, heavier in transition, and typically more efficient under scoreboard pressure in P2 draws. Geens/Guichard have a clear home-momentum angle in Brussels and can compete if they slow rallies and target the weaker aerial decision-maker. Prediction: Yanguas/Stupaczuk in 2 sets, with risk if they leak unforced errors early in the crowd atmosphere.