Greece assistant coach Dimitris Kravaritis hugs Christodoulos Kolomvos, left, and Konstantinos Mourikis (9) in the final moments of a win over Montenegro in a quarterfinal round men's water polo match at the 2020 Summer Olympics, Wednesday, Aug. 4, 2021, in Tokyo, Japan. (AP Photo/Mark Humphrey)

United States' head coach Dejan Udovicic talks to players during a preliminary round men's water polo match against Greece at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo, Japan. (AP Photo/Mark Humphrey)

Serbia's Filip Filipovic celebrates after scoring a goal against Italy during a quarterfinal round men's water polo match at the 2020 Summer Olympics, Wednesday, Aug. 4, 2021, in Tokyo, Japan. (AP Photo/Mark Humphrey)

Greece players and coaches celebrate in the final moments of a win over Montenegro in a quarterfinal round men's water polo match at the 2020 Summer Olympics, Wednesday, Aug. 4, 2021, in Tokyo, Japan. (AP Photo/Mark Humphrey)

Serbia's Dusan Mandic (2) shoots against Italy's Stefano Luongo (3) and Vincenzo Dolce (12) during a quarterfinal round men's water polo match at the 2020 Summer Olympics, Wednesday, Aug. 4, 2021, in Tokyo, Japan. (AP Photo/Mark Humphrey)

Italy's Michael Alexandre Bodegas, left, is comforted by teammate Matteo Aicardi after a loss to Serbia in a quarterfinal round men's water polo match at the 2020 Summer Olympics, Wednesday, Aug. 4, 2021, in Tokyo, Japan. (AP Photo/Mark Humphrey)