Salazar/Alonso arrive in Marseille with steadier 2026 form and higher-quality wins over the last 6–8 weeks, while Sainz/Eugenio have shown flashes but a more volatile level, especially in closing sets. Over the last 3 months there’s no meaningful recent H2H between these exact pairs, so the matchup leans on current form and role fit: Salazar’s control vs Sainz’s left-side pressure.