Ulsan Hyundai moved within a point of K-League leaders Pohang Steelers with a 3-0 win at Daejeon Citizen. All the goals came in the second half, with Chikashi Masuda, Han Sangwoon and Kin Shinwook finding the target.
Suwon Bluewings missed the chance to go clear at the top, going down 2-1 at Busan I'Park. Kim Daekyung put Suwon in front after just four minutes but Lim Sanghyub (11) and Jang Hackyong (78) won it for Busan.
Jeonbuk Motors are two points off the summit in third following their 2-0 win over Daegu FC. Leonardo opened the scoring in the 37th minute before Eninho sealed it on the hour mark.
Seongnam Chunma were 2-1 winners at home to FC Seoul. Lee Changhoon struck the decisive goal after efforts from Kim Dongsub and Kim Chiwoo cancelled each other out.