Galan/Chingotto enter as the higher-ceiling, more stable pair: Galan’s left-side power plus Chingotto’s right-side defense/transition typically sets a superior baseline in long rallies. Rubio/Ruiz can compete if they speed up points and win the middle early, but over a full match they’re likelier to leak errors under sustained pressure. Prediction: Galan/Chingotto in 2 sets unless Rubio/Ruiz dominate early break chances.