| 18. Round | 27/02/2021 | GKS Bełchatów | - | Górnik Łęczna | 1:2 |  |
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| 20. Round | 12/03/2021 | GKS Bełchatów | - | Bruk-Bet Termalica Nieciecza | 1:2 | ||||
| 21. Round | 20/03/2021 | GKS Tychy '71 | - | GKS Bełchatów | 0:0 | ||||
| 22. Round | 27/03/2021 | GKS Bełchatów | - | Odra Opole | 1:1 | ||||
| 23. Round | 03/04/2021 | ŁKS Łódź | - | GKS Bełchatów | 1:0 | ||||
| 24. Round | 10/04/2021 | GKS Bełchatów | - | OKS Stomil Olsztyn | 2:3 | ||||
| 25. Round | 18/04/2021 | Zagłębie Sosnowiec | - | GKS Bełchatów | 1:1 | ||||
| 26. Round | 23/04/2021 | GKS Bełchatów | - | Sandecja Nowy Sącz | 0:2 | |
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| 27. Round | 27/04/2021 | GKS Bełchatów | - | Widzew Łódź | 2:3 | ||||
| 28. Round | 02/05/2021 | Resovia Rzeszów | - | GKS Bełchatów | 1:3 |  |
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| 29. Round | 08/05/2021 | GKS Bełchatów | - | Arka Gdynia | 0:3 |  |
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| 31. Round | 21/05/2021 | GKS Bełchatów | - | Radomiak Radom | 0:1 | ||||
| 32. Round | 29/05/2021 | Chrobry Głogów | - | GKS Bełchatów | 0:1 | ||||
| 33. Round | 05/06/2021 | GKS Bełchatów | - | GKS Jastrzębie | 0:2 |
Poland