Tello/Alonso are the higher-ceiling pair: Tello’s power and reach can dominate Gijón’s quicker indoor pace, while Alonso’s stability should help them win long neutral exchanges. Martinez/Valenzuela can threaten if they slow the tempo and force uncomfortable volley decisions, but they’ll need near-perfect conversion on break chances. Prediction: Tello/Alonso in 2 tight sets if they control the net and avoid overhitting.