| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Alexandros•Papanastasiou |
| Used name | Alexandros•Papanastasiou |
| Original name | Αλέξανδρος•Παπαναστασίου |
| Born | 12 February 1999 in Athina (Athens), Attiki (GRE) |
| Measurements | 194 cm / 83 kg |
| Affiliations | VK Jug, Dubrovnik (CRO) |
| NOC |  Greece |
| Medals | OG |
| Gold | 0 |
| Silver | 1 |
| Bronze | 0 |
| Total | 1 |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 2020 Summer Olympics | Water Polo (Aquatics) | GRE |
Alexandros Papanastasiou | |||
| Water Polo, Men (Olympic) | Greece | 2 | Silver | |||
| 2024 Summer Olympics | Water Polo (Aquatics) | GRE |
Alexandros Papanastasiou | |||
| Water Polo, Men (Olympic) | Greece | 5 |
