Incheon United continued their good start to the K-League season with a 3-1 win at Seongnam Ilhwa on Saturday.
Incheon – who finished ninth last season – now top the table after two wins and one draw from their three fixtures.
After defeating reigning champions FC Seoul 3-2 on the road last week, Incheon again won an away match thanks to a terrific performance.
Han Gyo-Won put the winners in the lead after 40 minutes and their advantage was doubled 13 minutes after the break thanks to Lee Seok-Hyun.
And when Brazilian Diogo Acosta also got on the scoresheet, the home fans at the Seongnam Tancheon Sports Complex were stunned.
They pulled back a late consolation through Uzbekistan's Server Djeparov but that is all it was as the visitors claimed a deserved three points.
Jeonbuk Motors sit second on the table after claiming a 1-1 draw at Gyeongnam.
Belgian Kevin Oris opened the scoring for Jeonbuk after 16 minutes but Lee Jae-An responded for the hosts just after half time.
The day's other matches saw Daejeon Citizen and Jeju United finish level at 1-1 while Gangwon FC and Daegu played out a goalless stalemate.