AD Municipal Liberia secured a surprise 0-1 away victory over LD Alajuelense in the Costa Cup on February 4, 2026. The 10:00 kick-off produced a cup upset as the visitors defended resolutely and took their chance to knock out a top-tier opponent. The decisive moment was Liberia's solitary goal, likely scored in the first half from a set-piece or a swift counter, which allowed them to sit back and protect their lead. The match process saw Alajuelense dominate possession and create numerous chances, but they were repeatedly frustrated by a combination of poor finishing and excellent goalkeeping from the Liberia shot-stopper. The key focus point was a potential penalty appeal for the home side that was not given, adding to their frustration. This result sent Municipal Liberia through to the next round of the domestic cup, while it was a disappointing early exit for Alajuelense. The Liberia coach praised his team's defensive organization and commitment.