Ruiz/Rubio should enter as the more established pair, likely with cleaner shot selection and better control of the net in a FIP Silver setting. Frost/Yitbarek can be dangerous if they speed up rallies and win early volley exchanges, but they’ll need sustained accuracy under pressure. Prediction: Ruiz/Rubio in 2 sets unless Frost/Yitbarek dominate serve-return and net transitions.