Brea/Triay should enter as the more complete pair: a left-right balance with Triay’s left-side authority and Brea’s transition speed, usually translating well to high-stakes P1 matches. Martinez/Perez can compete if they prolong rallies and disrupt rhythm, but Buenos Aires conditions typically reward heavier, higher-percentage pressure that favors the more dominant left-side finisher. Prediction: Brea/Triay in 2 sets, with a tighter second if the underdogs win early defensive exchanges.