| 7. Round | 14/10/2017 | Panionios GSS | - | Olympiakos Piraeus | 3:4 | ||||
| 10. Round | 05/11/2017 | Olympiakos Piraeus | - | Platanias Chanion | 5:1 |  |
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| 11. Round | 18/11/2017 | Olympiakos Piraeus | - | Levadiakos | 2:1 | ||||
| 12. Round | 26/11/2017 | AO Kerkyra | - | Olympiakos Piraeus | 1:3 | ||||
| 13. Round | 02/12/2017 | Olympiakos Piraeus | - | Apollon Smyrnis | 3:1 | ||||
| 17. Round | 15/01/2018 | Olympiakos Piraeus | - | Lamia | 2:0 | ||||
| 20. Round | 04/02/2018 | Olympiakos Piraeus | - | AEK Athen | 1:2 |  |
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| 21. Round | 11/02/2018 | Atromitos | - | Olympiakos Piraeus | 2:2 | ||||
| 22. Round | 18/02/2018 | Olympiakos Piraeus | - | Panionios GSS | 1:0 | ||||
| 23. Round | 25/02/2018 | PAOK Saloniki | - | Olympiakos Piraeus | 0:3 dec. | ||||
| 24. Round | 04/03/2018 | Olympiakos Piraeus | - | Panathinaikos | 1:1 | ||||
| 25. Round | 11/03/2018 | Platanias Chanion | - | Olympiakos Piraeus | 0:4 |  |
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| 26. Round | 31/03/2018 | Levadiakos | - | Olympiakos Piraeus | 1:1 | |
Spain