San Marcos de Arica secured a commanding 3-0 victory over Deportes Concepción in a Chilean Liga de Ascenso fixture that kicked off at 04:30 on September 15, 2025. The comprehensive home win provided a significant boost to San Marcos's promotion aspirations while dealing a heavy blow to the visitors' campaign. The match was effectively decided in the first half as San Marcos raced into a two-goal lead, with a clinical finish from their striker setting the tone. They added a third after the interval to seal the result, with the home defense standing firm to keep a clean sheet. The standout performance came from the San Marcos midfield, which dominated possession and created numerous chances throughout the ninety minutes. This result sees San Marcos climb the league table, moving into a stronger playoff position, while Concepción will be left to rue a disjointed defensive display. The home manager praised his team's intensity, stating, "We executed our game plan perfectly from the first minute." The Concepción coach acknowledged the superiority of the opposition, saying, "We were second best in every department today and must improve quickly." The starting XI for San Marcos featured their first-choice goalkeeper and a solid back four, while Concepción fielded an attacking lineup that ultimately failed to fire.