In front of 30,000 fans at Jeonju World Cup Stadium, Jeonbuk were given a lesson in finishing by a clinical Seongnam side who are in action in the AFC Champions League on Wednesday night in a must-win clash with Dong Tam Long An.

Yeom Ki-hoon and Brazilian striker Ze Carlos went close on a number of occasions but it was Jang Hak-young who put the visitors ahead after 16 minutes with a left-foot shot from the edge of the area.

Seongnam began to establish control helped by influential duo Kim Doo-hyun and Choi Sung-kuk and it was no surprise when they added a second with 17 minutes remaining, Brazilian Mota finishing nicely after finding space in the area.

Korea Republic's other representatives in the AFC Champions League, Chunnam Dragons defeated Pohang Steelers 2-1 to record only their second win of the season.

Kang Min-su opened the scoring for the Dragons by heading home on the half-hour but the visitors hit back after 36 minutes thanks to a Kim Jin-kyu own goal.

With 18 minutes remaining, international defender Kim Chi-woo drove home a left-foot shot to earn three points for Chunnam.

Suwon Samsung Bluewings came from behind to defeat basement-dwellers Gwangju Sangmu 3-1 and stay three points behind Seongnam in second.

Gyeongnam FC moved into third with a 1-0 win at home to Daegu while FC Seoul drew 0-0 at Daejeon Citizen and manage to stay fifth despite failing to score for a sixth consecutive game.

Elsewhere, Incheon United drew 2-2 at home to Busan l'Park while Ulsan Hyundai Horang-I were defeated 2-1 at the home of Jeju United.