| 3. Jornada | 23.05.2020 | Gangwon FC | - | Seongnam FC | 1:1 | ||||
| 4. Jornada | 31.05.2020 | FC Seoul | - | Seongnam FC | 0:1 |  |
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| 5. Jornada | 07.06.2020 | Seongnam FC | - | Daegu FC | 1:2 | ||||
| 8. Jornada | 20.06.2020 | Seongnam FC | - | Sangju Sangmu | 0:1 | ||||
| 10. Jornada | 05.07.2020 | Seongnam FC | - | Pohang Steelers | 0:4 | ||||
| 14. Jornada | 01.08.2020 | Seongnam FC | - | FC Seoul | 1:2 | |
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| 16. Jornada | 14.08.2020 | Seongnam FC | - | Busan IPark | 1:1 | ||||
| 17. Jornada | 23.08.2020 | Seongnam FC | - | Ulsan Hyundai FC | 1:2 | ||||
| 18. Jornada | 30.08.2020 | Pohang Steelers | - | Seongnam FC | 2:1 | ||||
| 20. Jornada | 12.09.2020 | Sangju Sangmu | - | Seongnam FC | 0:0 | ||||
| 21. Jornada | 16.09.2020 | Daegu FC | - | Seongnam FC | 3:2 |
Croacia