This FIP Silver matchup likely hinges on which pair controls the net first and sustains pressure through longer Scandinavian indoor-style rallies, where volleys and bandejas dominate. Fernandez Sanchez/Merino Nieto look like a more “Spanish-structure” pair (higher tolerance in construction), while Hazouri Celorio/Berta may lean on first-strike patterns and disruption; the safer pick is Fernandez/Merino in a tight match if they win the net exchanges early.