CD Copiapó S.A. earned a 3-1 home win over San Marcos de Arica in the Chilean Liga de Ascenso on October 12, 2025. The victory at the Estadio Luis Valenzuela Hermosilla was a crucial result for Copiapó in their push for promotion from Chile's second tier. The home side started strongly, taking an early lead and adding a second goal before halftime to take firm control. San Marcos de Arica improved after the break and managed to pull a goal back, setting up a tense final half-hour. However, Copiapó sealed the three points with a decisive third goal in the 75th minute, capitalizing on a defensive error. The win demonstrated Copiapó's attacking efficiency and resilience, important traits for any team with aspirations of reaching the top flight.