Valencia P1 conditions (typically lively indoor-style bounce and fast ball) reward teams that hold the net and finish quickly, so this matchup likely hinges on who wins the first two shots after the return. Fassio Goyeneche/Eugenio Barrera project as a steadier construction pair, while Caldera Sánchez/Goenaga García profile as a more explosive, pace-driven duo; in a fast environment that slightly favors Caldera/Goenaga in tight sets. Prediction: narrow edge to Caldera Sánchez/Goenaga García if they secure early net control and shorten rallies.