Pohang Steelers kept the pressure on K-League leaders Jeonbuk Motors with a 7-0 mauling of lowly Daejeon Citizen.
Kim Jae-Sung opened the floodgates in the sixth minute before Pohang scored three times in an eight-minute spell just after the half-hour through Hwang Jin-Sung and Mota, twice, to take a 4-0 advantage into half-time.
Shin Kwang-Hoon, Mu Ko and Kim Gi-Dong added further goals after the break as Pohang bounced back in style after suffering only their second defeat of the season at Suwon Bluewings last time out.
Jeju throw away lead
The victory moves Pohang to within two points of Jeonbuk, who are away to Ulsan tomorrow, and five clear of third-placed Jeju United, who surrendered a 2-0 lead to lose 3-2 at home to Gyeongnam.
Jeju looked on course for the win when Park Hyun-Beom's penalty and a Junior Santos strike put them two goals ahead by the hour mark, but Gyeongnam netted three times in the final 13 minutes to claim the spoils, Kim In-Han netting the winner just before the end.
Busan, Seoul produce turnarounds
Fourth-placed Busan I'Park took advantage of Jeju's slip-up to narrow the gap between the pair to two points, beating Daegu 3-2.
Daegu twice led through goals from Yoo Kyoung-Youl and Hwang Il-Su, but Busan emerged victorious thanks to an own goal from Yoo and late strikes from Park Jong-Woo and Han Sang-Woon.
FC Seoul were also celebrating a comeback 3-2 victory as they defeated Sangju Sangmu Phoenix, with Bang Seung-Hwan scoring the clincher in the last minute. Earlier, Dejan Damjanovic's second-half brace for Seoul was sandwiched between goals from Kim Jung-Woo and Kim Min-Soo for visitors Sangju.
The day's other K-League game saw Gwangju beat bottom club Gangwon 2-0 thanks to goals in either half from Lee Seung-Ki.