Diestro/Piotto should carry the higher tactical ceiling: Diestro’s experience in managing tempo and net-positioning pairs well with Piotto’s likely energy and finishing. Hernandez/Martinez can compete if they extend rallies and disrupt the first-volley patterns, but in Valladolid’s typically quicker indoor-style conditions, the cleaner transition team usually prevails. Prediction: Diestro/Piotto in 2 tight sets, with breaks coming from return pressure on the weaker serve lane.