Nieto/Sanz should control this matchup through higher pace tolerance and better transition work, especially if they dictate with the left-right balance (Sanz finishing, Nieto building). Piotto/Diestro can compete if they slow rallies and turn it into a lob-and-counter pattern, but over best-of-three in Bordeaux’s typically quicker indoor conditions, the edge favors the more explosive pair. Prediction: Nieto/Sanz in 2 tight sets, with tiebreak risk if Piotto/Diestro protect serve early.