| 1. Round | 26/09/2020 | Suwon Bluewings | - | FC Seoul | 3:1 | ||||
| 2. Round | 04/10/2020 | FC Seoul | - | Busan IPark | 1:2 |  |
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| 3. Round | 17/10/2020 | Seongnam FC | - | FC Seoul | 0:1 | |
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| 4. Round | 24/10/2020 | FC Seoul | - | Gangwon FC | 1:1 | ||||
| 5. Round | 31/10/2020 | FC Seoul | - | Incheon United | 0:1 | |
| Osmar Barba Ibáñez | |
| Born: | 05.06.1988 |
| Place of birth: |
Santoña, 
Spain |
| Nationality: |
Spain
|
| Height: | 192 cm |
| Weight: | 84 kg |
| Position(s): | Centre Back Defensive Midfielder |
| Foot: | left |
