Mariano Landaluce enters the Aix en Provence quarterfinals as Spain's world number 99, seeking to build momentum on clay after splitting his last five matches with wins over Dominique Jade and Hugo Gaston. The Spanish player faces an uphill task against American qualifier Emil Quinn, who holds a 1–0 head-to-head advantage from their previous meeting. Landaluce's recent form has been inconsistent, with losses to Lorenzo Musetti, Alexei Walton and Romain Collignon offsetting his pair of victories on the surface.

Emil Quinn arrives at the Aix en Provence quarterfinals ranked 48th in the world from the United States, boasting a winning record against Mariano Landaluce after claiming their sole head-to-head encounter. Quinn enters this clay-court matchup on mixed form, having won three of his last five matches including victories over Reilly Opelka, Davit Merida Aguilar and Nikoloz Basilashvili, though recent losses to Cameron Norrie and Felix Marozsan suggest some inconsistency. The American will look to exploit his superior ranking advantage against the Spanish opponent in this eighth-final clash.