Triay/Brea should enter as the more stable, high-floor pair: Triay’s left-side authority plus Brea’s aggressive finishing typically translate well in indoor-like P2 conditions such as Gijón. Sánchez/Ustero can spike level with Sánchez’s tempo control and Ustero’s youthful speed, but they’ll need longer rallies and fewer short errors to avoid being bled at the net. Prediction: Triay/Brea in a tight two sets or three, decided by who wins the left-side diagonals.