Ulsan Hyundai maintained their one-point lead at the top of the K-League with a resounding 4-1 win over Gyeongnam.
It took just 12 minutes for Roberto Cesar to open the scoring for the home side before Han Sangwoon struck twice in the 48th and 69th minutes, the latter from the penalty spot.
Lee Jaean pulled one back for Gyeongnam in the dying minutes but there was still time for Byun Woong to add another for Ulsan.
They remain at the top of the table with a slender lead over Incheon United, who were 3-0 winners at Busan I'Park.
Lee Chunsoo, Lee Seokhyun and Diogo Acosta were the scorers for the visitors.
Goals either side of half-time from Kim Sungjoon and Server Djeparov lifted Seongnam Chunma to a 2-0 victory over Daejeon Citizen.