Rufo/Castelló should be favored on paper: more stable in structured exchanges and typically higher ceiling in fast transition play, which often decides FIP Silver matches. Bidahorria/Caparrós can compete if they slow the tempo and extend rallies, but they’ll need near-perfect side discipline and error control under London’s indoor-style conditions. Prediction: Rufo/Castelló in 2, with a tight first set if the underdogs hold serve early.