| 1. Round | 11/04/2021 | IFK Norrköping | - | IK Sirius | 1:1 | ||||
| 2. Round | 18/04/2021 | IK Sirius | - | Halmstads BK | 1:0 | ||||
| 3. Round | 24/04/2021 | BK Häcken | - | IK Sirius | 1:2 | ||||
| 4. Round | 01/05/2021 | IK Sirius | - | Kalmar FF | 1:1 | ||||
| 5. Round | 08/05/2021 | Hammarby IF | - | IK Sirius | 3:2 | ||||
| 6. Round | 12/05/2021 | IK Sirius | - | IF Elfsborg | 0:2 | ||||
| 7. Round | 17/05/2021 | IFK Göteborg | - | IK Sirius | 2:2 | ||||
| 8. Round | 22/05/2021 | Östersunds FK | - | IK Sirius | 3:0 | ||||
| 9. Round | 04/07/2021 | IK Sirius | - | Mjällby AIF | 2:1 | ||||
| 10. Round | 10/07/2021 | Malmö FF | - | IK Sirius | 4:0 | ||||
| 12. Round | 24/07/2021 | IK Sirius | - | Degerfors IF | 2:0 | ||||
| 13. Round | 02/08/2021 | IK Sirius | - | Örebro SK | 1:2 | ||||
| 14. Round | 09/08/2021 | Varbergs BoIS | - | IK Sirius | 0:0 | ||||
| 15. Round | 16/08/2021 | IK Sirius | - | AIK Solna | 0:1 | ||||
| 16. Round | 22/08/2021 | Örebro SK | - | IK Sirius | 1:1 | ||||
| 17. Round | 29/08/2021 | IK Sirius | - | Djurgårdens IF | 1:0 | ||||
| 23. Round | 16/10/2021 | IK Sirius | - | Varbergs BoIS | 2:1 |
Sweden