Head to Head
| Greece A1 | 2022/02/05 11:00 | Ethnikos Piraeus v Olympiakos | W | 4-14 |
| Greece A1 | 2021/11/23 17:30 | Olympiakos v Ethnikos Piraeus | W | 16-3 |
| Greece A1 | 2021/03/27 10:00 | Olympiakos v Ethnikos Piraeus | W | 18-4 |
| Greece A1 | 2019/05/10 17:30 | Ethnikos Piraeus v Olympiakos | W | 3-13 |
| Greece A1 | 2019/04/10 16:30 | Ethnikos Piraeus v Olympiakos | W | 6-17 |
| Others | 2019/01/05 11:59 | Olympiakos v Ethnikos Piraeus | W | 14-6 |
Home History
| Champions League | 2023/01/10 17:00 | Olympiakos v CN Barceloneta | L | 7-9 |
| Greece A1 | 2023/01/07 18:30 | AEK v Olympiakos | W | 7-20 |
| Greece Cup | 2023/01/04 12:00 | Olympiakos v NO Chios | W | 18-5 |
| Champions League | 2022/12/20 18:00 | Waspo Hannover v Olympiakos | W | 7-16 |
| Champions League | 2022/12/13 17:00 | Jadran Split v Olympiakos | W | 8-13 |
| Champions League | 2022/11/29 12:45 | Dinamo Tbilisi v Olympiakos | W | 9-21 |
| Champions League | 2022/11/15 17:30 | Olympiakos v Pro Recco | W | 9-7 |
| Greece A1 | 2022/11/05 12:30 | Olympiakos v AEK | W | 25-0 |
Away History
| Greece Cup | 2023/01/11 17:30 | Ethnikos Piraeus v Nireas Chalandriou | W | 18-11 |
| Greece A1 | 2022/11/05 11:45 | Nireas Chalandriou v Ethnikos Piraeus | W | 11-16 |
| Greece A1 | 2022/11/02 17:30 | Ethnikos Piraeus v Ydraikos | L | 8-11 |
| Greece A1 | 2022/10/26 17:30 | Panionios v Ethnikos Piraeus | L | 14-7 |
| Greece A1 | 2022/10/15 14:00 | Panathinaikos v Ethnikos Piraeus | L | 10-8 |
| Greece A1 | 2022/10/08 13:00 | Ethnikos Piraeus v NO Chios | W | 10-9 |
| Water Polo Matches | 2022/09/25 15:00 | Ethnikos Piraeus v PAOK | L | 6-8 |
| Water Polo Matches | 2022/09/25 07:00 | NO Vouliagmenis v Ethnikos Piraeus | L | 17-5 |