This matchup likely hinges on experience and control: Llaguno’s veteran decision-making and net management should stabilize Fassio Goyeneche and win long, tactical rallies. Barrera/Velasco can threaten if they speed up with aggressive bandejas/víboras and quick transitions, but in Gijón’s typically heavier indoor conditions the pair with better patience and positioning usually prevails. Edge to Fassio Goyeneche/Llaguno in two tight sets if they dominate the right-side patterns.