Posusje fell to a 0-1 home defeat against league powerhouse HSK Zrinjski Mostar in the Bosnia and Herzegovina Premier League on September 14, 2025. The reigning champions secured a hard-fought victory with a single goal, demonstrating their title-winning mentality. In a match where Posusje defended doggedly, Zrinjski's superior quality eventually told as they broke the deadlock in the second half. The home side had limited opportunities but remained organized until the decisive moment. This result reinforces Zrinjski Mostar's position at the top of the table as they continue their pursuit of another championship. For Posusje, a narrow loss to the best team in the league is no disgrace, but it highlights the challenge of competing with the established elite in the Premier League.