Ulsan HD FC secured a narrow 1-0 victory over Jeju SK FC in the Korean K League 1 on August 9, 2025. The lone goal, scored midway through the second half, was enough for Ulsan to claim all three points at home and strengthen their position at the top of the table. Ulsan dominated possession for large periods but faced stubborn resistance from a well-drilled Jeju defense. The breakthrough finally came from a set-piece situation, with a defender rising highest to head home from a corner, sending the home fans into raptures. Jeju pushed for an equalizer in the closing stages but could not find a way past Ulsan's goalkeeper, who made a crucial late save to preserve the clean sheet. This win was a vital step for Ulsan in their title defense, while Jeju's search for an away win continued.