Gwangju FC climbed above Suwon Bluewings to the top of the early K-League standings with a 2-1 win at Busan IPark.
Kim Su-Beom gave the visitors a tenth-minute lead but Lim Sang-Hyub cancelled it out seven minutes into the second half. However, Gwangju claimed their third win from four games as Brazilian forward Joao Paulo netted his third league goal of the season after 65 minutes.
Suwon, who started the day with a 100 per cent record from their opening three games, lost 2-1 away to Jeju United. The Bluewings took a 28th-minute lead through Everton, only for fellow Brazilian Robert to draw Jeju level before Seo Dong-Hyun's last-gasp goal made it two home wins from two for the islanders, who are now fifth.
Chunnam Dragons claimed their first win of the season with a 3-1 home victory over Gyeongnam. All four goals came in the second half as Lee Jong-Ho, Son Seol-Min and Shim Dong-Woon ensured the points for the Dragons before Jo Jae-Cheol scored a late consolation for the visitors.
Incheon United, who had lost their opening three games, were 2-1 winners at home to Daejeon Citizen as former Reading and Wolverhampton Wanderers forward Seol Ki-Hyeon scored a second-half brace. Heo Beom-San pulled one back for Daejeon in the 67th minute.