Busan I'Park climbed the K-League ladder after a comfortable 2-0 win over Seongnam on Sunday.
A goal after 20 minutes from Willian gave Busan an early lead and the three points were sealed in the 72nd minute thanks to a Young-Sun Yun own-goal.
The win sees Busan move into seventh place on seven points while Seongnam drop to the bottom of the table on two points.
Elsewhere, Daejeon Citizen scored in the final minute of their game against Gyeongnam to escape with a 1-1 draw.
Milan Bubalo put Gyeongnam ahead with seven minutes to play but Lucio Flavio popped up in the 90th minute to steal a point for the home side.
Chunnam Dragons also scored in the dying stages as they drew 1-1 with Gangwon. After a scoreless first-half, Hyo-Sung Bae put Gangwon ahead in the 53rd minute before Jong-Ho Lee levelled scores with two minutes to play.
The point sees Chunnam move off the foot of the table while Gangwon remain just one point in front of them after five games.