Ruiz/Esbri enter as the more stable, higher-ceiling pair: Ruiz’s left-side control and experience in P1 conditions should tilt long rallies their way. Piotto/Ortega can compete if they speed up points and win the first-volley battle, but over a full match Buenos Aires tends to reward patience and clean bandeja/vibora management. Prediction: Ruiz/Esbri in 2 tight sets, with breaks coming from sustained pressure to Piotto/Ortega’s right side.