| 1. Round | 22/08/1998 | OFI Heraklion | - | Ethnikos Piraeus | 3:0 | ||||
| 2. Round | 29/08/1998 | Paniliakos Pyrgos | - | Ethnikos Piraeus | 2:0 | ||||
| 3. Round | 12/09/1998 | Ethnikos Piraeus | - | AO Proodeftiki | 0:2 | ||||
| 5. Round | 26/09/1998 | Ethnikos Piraeus | - | PAOK Saloniki | 1:1 | ||||
| 6. Round | 03/10/1998 | Ionikos Nikea | - | Ethnikos Piraeus | 5:0 | ||||
| 7. Round | 24/10/1998 | Ethnikos Piraeus | - | Aris Saloniki | 1:1 |  |
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| 8. Round | 31/10/1998 | AO Kavala | - | Ethnikos Piraeus | 3:0 | ||||
| 9. Round | 07/11/1998 | Ethnikos Piraeus | - | Panathinaikos | 0:0 | ||||
| 10. Round | 21/11/1998 | Ethnikos Piraeus | - | Panionios GSS | 0:4 | ||||
| 12. Round | 05/12/1998 | Ethnikos Piraeus | - | Skoda Xanthi | 1:1 | ||||
| 13. Round | 13/12/1998 | Olympiakos Piraeus | - | Ethnikos Piraeus | 2:0 | ||||
| 24. Round | 20/03/1999 | Aris Saloniki | - | Ethnikos Piraeus | 4:0 | ||||
| 26. Round | 18/04/1999 | Panathinaikos | - | Ethnikos Piraeus | 5:1 | ||||
| 29. Round | 08/05/1999 | Skoda Xanthi | - | Ethnikos Piraeus | 2:0 | ||||
| 30. Round | 11/05/1999 | Ethnikos Piraeus | - | Olympiakos Piraeus | 0:3 | ||||
| 31. Round | 15/05/1999 | AEK Athen | - | Ethnikos Piraeus | 2:0 |
Brazil