Alonso/Goñi look like the more established pair and should control Brussels P2 with better structure in the build-up and more reliable net patterns. Sintes Villalonga/Santigosa can compete if they speed up points and disrupt rhythm early, but over a full match the favorite is Alonso/Goñi in 2 tight sets or 3. Indoor-like Brussels conditions typically reward first-volley quality and disciplined side-to-side pressure, which suits the steadier duo.