The Korea Republic side left it late to translate their dominant display into goals, with Kim In-sung netting in the 87th minute, before Junior Negrao got his second goal of the tournament one minute from time.

The Australian side went into the game knowing anything less than their first-ever AFC Champions League win would mean early elimination on their debut, while Ulsan Hyundai needed the three points to stay clear off FC Tokyo in the race for round-of-16 places.

Just three days after losing 5-0 to the same opposition, Chiangrai stunned the Koreans thanks to their Brazilian striker, who opened the scoring late in the first half, then poked home an 89th minute winner to keep Thailand’s only representative alive in the competition.

The result blows Group E wide open. Seoul remain in second place on six points, with Melbourne Victory and Chiangrai both three points adrift with two matches remaining.

Both sides got the second half of their group stage campaign underway with their eyes firmly focused on moving closer to runaway leaders Ulsan Hyundai who had earlier beaten Perth Glory 2-0.

Goals from Jonathan Viera and Zhang Yuning gave Bruno Génésio’s side a third win in the seven days, taking them beyond the group stage of the competition for the first time since 2015, and doing so with two games to spare.

While Beijing can look forward to the knockout stage, where they will join Japan’s Vissel Kobe, a third successive defeat in the competition leaves Melbourne Victory’s hopes of progression hanging by a thread, with the Australian club now relying on circumstances beyond their control if they are to extend their stay in Doha.

Doha: Jeonbuk Hyundai Motors' Song Beom-keun has been voted by the fans as the 2020 AFC Champions League (East) Toyota Player of the Week after the goalkeeper's phenomenal performance against Sydney FC on Wednesday.

The recently turned 23-year-old custodian was in superlative form making eight saves as he kept a cleansheet to help the Korean champions secure a vital three points in the Group H clash.