Riera/Navarro arrive as the more established pair for a Major setting: Riera’s heavier left-side offense plus Navarro’s steadier right-side control should translate into longer, higher-quality point construction. Las Heras/Mesa can threaten in bursts with quicker transitions and pressure volleys, but they’ll need to win the first 4–6 games to avoid getting dragged into Riera’s rhythm. Prediction: Riera/Navarro in 2 sets, with a tighter second if Las Heras/Mesa start fast.