| Date | R | Home v Away | - |
|---|---|---|---|
| 07/27 10:50 | 2 |
Australia v Croatia
|
11-8 |
| 07/27 09:20 | 2 |
Japan v Hungary
|
11-16 |
| 07/27 06:30 | 2 |
Italy v Greece
|
6-6 |
| 07/27 05:00 | 2 |
Kazakhstan v Serbia
|
5-19 |
| 07/27 02:30 | 2 |
Montenegro v Spain
|
6-8 |
| 07/27 01:00 | 2 |
South Africa v USA
|
3-20 |
| 07/25 10:50 | 1 |
Croatia v Kazakhstan
|
23-7 |
| 07/25 09:20 | 1 |
Serbia v Spain
|
12-13 |
| 07/25 06:30 | 1 |
Australia v Montenegro
|
10-15 |
| 07/25 05:00 | 1 |
USA v Japan
|
15-13 |
| 07/25 02:30 | 1 |
Hungary v Greece
|
9-10 |
| 07/25 01:00 | 1 |
South Africa v Italy
|
2-21 |
The men's tournament of water polo at the 2020 Summer Olympics at Tokyo, Japan began on 25 July and ended on 8 August 2021. It was held at the Tokyo Tatsumi International Swimming Center. It was the 27th official appearance of the tournament, which was not held in 1896 and was a demonstration sport in 1904 but otherwise had been held at every Olympics.
On 24 March 2020, the Olympics were postponed to 2021 due to the COVID-19 pandemic. Because of this pandemic, the games are played behind closed doors.
Serbia won their second consecutive gold medal after a finals win over Greece, while Hungary captured the bronze medal.
The medals for the competition were presented by Nenad Lalović, IOC Executive Board Member; Serbia and the medalists' bouquets were presented by Andrey Kryukov, Kazakhstan; FINA Bureau Member.