Head to Head
| Water Polo Matches | 2022/09/22 17:30 | Ydraikos v Ethnikos Piraeus | W | 11-13 |
| Greece A1 | 2021/04/14 16:30 | Ethnikos Piraeus v Ydraikos | L | 6-8 |
| Greece A1 | 2019/05/05 12:58 | Ydraikos v Ethnikos Piraeus | W | 5-6 |
| Greece A1 | 2019/05/03 16:30 | Ethnikos Piraeus v Ydraikos | W | 9-6 |
| Others | 2018/05/06 12:30 | Ethnikos Piraeus v Ydraikos | W | 1-0 |
| Others | 2018/05/02 12:30 | Ethnikos Piraeus v Ydraikos | D | 6-6 |
| Others | 2017/12/01 14:00 | Ethnikos Piraeus v Ydraikos | L | 5-7 |