Curico Unido fell to a 3-1 defeat at home against San Luis Quillota in the Chilean Liga de Ascenso on September 14, 2025. This result was a setback for Curico's promotion hopes as San Luis Quillota executed a effective away performance. San Luis took control of the match early, scoring twice in the first half to establish a commanding lead. Curico Unido managed to pull a goal back after the break to create a tense finale, but San Luis Quillota sealed the victory with a late third goal on the counter-attack. The key moment was a missed penalty or a crucial save by the San Luis goalkeeper that denied Curico an equalizer. This loss impacts the league table in the promotion playoff race, with San Luis Quillota gaining ground. The lineups featured experienced campaigners for the visitors, whose know-how proved decisive in a tough away fixture.