Week 23
| Date | Event | Team 1 | Score | Team 2 |
| 27-09-2020 | Champions Group | Sangju Sangmu | 0-1 Lee Seung-ki | Jeonbuk Motors |
| 27-09-2020 | Champions Group | Daegu FC | 2-2 Cesinha, Park Han-bin / Junior Negao, Kim Tae Hwan | Ulsan Hyundai |
| 27-09-2020 | Champions Group | Pohang Steelers | 5-3 Stanislav Iljutcenko (2), Aleksandar Palocevic (2), Lee Kwang-hyeok / Felipe Silva, Willyan, Won-sang Eom | Gwangju FC |
| 26-09-2020 | Relegation Group | Suwon Bluewings | 3-1 Adam Taggart (3) / Yeong-uk Jo | FC Seoul |
| 27-09-2020 | Relegation Group | Busan I Park | 0-2 Mu Yeol Ko, Young Jae Lee | Gangwon FC |
| 27-09-2020 | Relegation Group | Seongnam FC | 0-6 Joon Beom Kim, Stefan Mugosa (3), Kim Do Hyuk (2) | Incheon United |
Week 24
| Date | Event | Team 1 | Score | Team 2 |
| 02-10-2020 | Champions Group | Ulsan Hyundai | 4-1 Seung Hyun Jung (2), Bjorn Johnsen (2) / Won Jin Jung | Sangju Sangmu |
| 03-10-2020 | Champions Group | Gwangju FC | 0-1 Jae-mun Ryu | Daegu FC |
| 03-10-2020 | Champions Group | Jeonbuk Motors | 0-1 Min-kyu Song | Pohang Steelers |
| 04-10-2020 | Relegation Group | Gangwon FC | 2-1 Kim Ji-Hyun, Lim Chai-Min / Na Sang-Ho | Seongnam FC |
| 04-10-2020 | Relegation Group | FC Seoul | 1-2 Jung Han-Min / Lee Gyu-Seong, Park Jong-Woo | Busan I Park |
| 04-10-2020 | Relegation Group | Incheon United | 0-1 Kim Tae-Hwan | Suwon Bluewings |
Week 25
| Date | Event | Team 1 | Score | Team 2 |
| 17-10-2020 | Champions Group | Sangju Sangmu | 2-1 An Tae-Hyun, Kim Jae-Woo (og) / Cesinha | Daegu FC |
| 18-10-2020 | Champions Group | Jeonbuk Motors | 4-1 Jun-ho Son, Takahiro Kunimoto, Kim Bo Kyung, Han Kyo-won / Kim Jeong-hwan | Gwangju FC |
| 18-10-2020 | Champions Group | Pohang Steelers | 4-0 Stanislav Iljutcenko (2), Aleksandar Palocevic (2) | Ulsan Hyundai |
| 16-10-2020 | Relegation Group | Gangwon FC | 3-1 Su Beom Kim, Ji-hyeon Kim, Hyeon-sik Lee / Stefan Mugosa | Incheon United |
| 17-10-2020 | Relegation Group | Seongnam FC | 0-1 Park Chu-Young | FC Seoul |
| 18-10-2020 | Relegation Group | Busan I Park | 0-0 | Suwon Bluewings |
Week 26
| Date | Event | Team 1 | Score | Team 2 |
| 17-10-2020 | Champions Group | Daegu FC | 3-2 Cesinha (2), Dejan Damjanovic / Aleksandar Palocevic, Stanislav Iljutcenko | Pohang Steelers |
| 18-10-2020 | Champions Group | Gwangju FC | 0-1 Park Dong Jin | Sangju Sangmu |
| 18-10-2020 | Champions Group | Ulsan Hyundai | 0-1 Modou Barrow | Jeonbuk Motors |
| 23-10-2020 | Relegation Group | Suwon Bluewings | 1-2 Gun Hee Kim / Sang Ho Na, Tomislav Kis | Seongnam FC |
| 24-10-2020 | Relegation Group | FC Seoul | 1-1 Ju-yeong Park / Mu Yeol Ko | Gangwon FC |
| 24-10-2020 | Relegation Group | Incheon United | 2-1 Dae Joong Kim, Dong-yun Jeong / Dong-jun Lee | Busan I Park |
Week 27
| Date | Event | Team 1 | Score | Team 2 |
| 01-11-2020 | Champions Group | Pohang Steelers | 3-1 Sang Woo Kang, Stanislav Iljutcenko, Young Jun Goh / Kyung Won Kwon | Sangju Sangmu |
| 01-11-2020 | Champions Group | Ulsan Hyundai | 3-0 Bit Garam Yoon, Junior Negao, Dong Kyung Lee | Gwangju FC |
| 01-11-2020 | Champions Group | Jeonbuk Motors | 2-0 Kyu Sung Cho (2) | Daegu FC |
| 31-10-2020 | Relegation Group | Seongnam FC | 2-1 Hong Si-Hoo, Ma Sang-Hoon / Lee Dong-Jun | Busan I Park |
| 31-10-2020 | Relegation Group | Gangwon FC | 1-2 Ko Moo-Yeol / Doneil Henry, Adam Taggart | Suwon Bluewings |
| 31-10-2020 | Relegation Group | FC Seoul | 0-1 Elias Aguilar | Incheon United |