Incheon United came from behind to secure their first win of the K-League season after beating FC Seoul 3-2 on Saturday.
Seoul took the lead through Adilson in the 29th minute, but went on the back foot when Seok-Hyun Lee and Diogo Acosta struck on either side of half-time for Incheon. Hee-Seong Park levelled proceedings for Seoul in the 68th minute, before Sang-Yun Moon found the winner for Incheon with 10 minutes to go.
Meanwhile, two goals from Chan-Ho Cho guided Pohang Steelers to a comfortable 3-0 victory over Daejeon Citizen.
Mu-Yeol Ko opened the scoring in the 18th minute, with Cho striking twice in the second half to seal the result.
Jeonbuk Motors climbed to the top of the table after claiming a 2-1 win against Ulsan.
Goals from Leonardo and Hee-Do Park secured the win for Jeonbuk, who lead the standings with six points and a superior goal difference.
Elsewhere, Do-Heon Kim scored the decisive goal as Suwon Bluewings overcame Gangwon 1-0, while Jeju United entertained Seongnam in a 1-1 draw.