Ortega/Calvo project as the steadier, higher-ceiling pair: Ortega’s proven left-side control and transition game should set a high baseline, while Calvo can add pace and surprise if she stays tidy under pressure. Manquillo/Aguilar’s path is to shorten points with aggressive volleys and targeted lobs, but over a full match they’re more likely to leak errors when forced into repeated defensive sequences. In Brussels’ typically heavier indoor conditions, I favor Ortega/Calvo to win by controlling the net and managing risk.