Sainz/Eugenio arrive in Marseille with stronger 2025–26 form and a clear edge in control-style matchups, having consistently held serve and converted break points better over the last 6–8 weeks. Valenzuela/Piltcher have shown flashes (especially in faster indoor conditions) but their recent results include early exits against top-30 pairs and visible dips in second-set intensity, making them underdogs unless they can speed up the rallies and protect their right-side lanes.