| 1. Round | 19/08/2017 | Olympiakos Piraeus | - | AE Lárissa | 4:1 | ||||
| 6. Round | 01/10/2017 | Olympiakos Piraeus | - | Atromitos | 0:1 | ||||
| 10. Round | 05/11/2017 | Olympiakos Piraeus | - | Platanias Chanion | 5:1 | ||||
| 11. Round | 18/11/2017 | Olympiakos Piraeus | - | Levadiakos | 2:1 | ||||
| 22. Round | 18/02/2018 | Olympiakos Piraeus | - | Panionios GSS | 1:0 | ||||
| 25. Round | 11/03/2018 | Platanias Chanion | - | Olympiakos Piraeus | 0:4 | ||||
| 26. Round | 31/03/2018 | Levadiakos | - | Olympiakos Piraeus | 1:1 | ||||
| 27. Round | 16/04/2018 | Olympiakos Piraeus | - | AO Kerkyra | 5:1 | ||||
| 29. Round | 29/04/2018 | Olympiakos Piraeus | - | Panetolikos | 4:0 |
Portugal