Chozas/Libaak bring higher ceiling and more natural aggression, especially if they can keep tempo high in Asunción’s typically lively conditions. Sanz/Nieto are the steadier pairing: if they slow rallies, win the middle, and force long point construction, they can flip momentum. Slight edge to Chozas/Libaak in a tight match if they protect the right side and finish efficiently at net.