1. Round | 01/03/2018 | Jeju United | - | FC Seoul | 0:0 | ||||
2. Round | 11/03/2018 | FC Seoul | - | Gangwon FC | 1:2 | ||||
3. Round | 18/03/2018 | Jeonbuk FC | - | FC Seoul | 2:1 | ||||
4. Round | 01/04/2018 | FC Seoul | - | Incheon United | 1:1 | ||||
5. Round | 08/04/2018 | Suwon Bluewings | - | FC Seoul | 0:0 | ||||
6. Round | 11/04/2018 | FC Seoul | - | Pohang Steelers | 2:1 | ||||
7. Round | 14/04/2018 | Ulsan Hyundai FC | - | FC Seoul | 1:0 | ||||
8. Round | 21/04/2018 | FC Seoul | - | Daegu FC | 3:0 | ||||
15. Round | 08/07/2018 | Daegu FC | - | FC Seoul | 2:2 | ||||
16. Round | 11/07/2018 | Pohang Steelers | - | FC Seoul | 0:3 | ||||
17. Round | 15/07/2018 | FC Seoul | - | Ulsan Hyundai FC | 1:1 |