Greece's Ioannis Fountoulis celebrates after scoring a goal against the United States during a preliminary round men's water polo match at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo, Japan. (AP Photo/Mark Humphrey)

Spain's Alberto Munarriz Egana plays against Croatia during a preliminary round men's water polo match at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo, Japan. (AP Photo/Mark Humphrey)

Spain's Miguel de Toro Dominguez (5) and Croatia's Marko Macan (2) battle for position during a preliminary round men's water polo match at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo, Japan. (AP Photo/Mark Humphrey)

Serbia's Strahinja Rasovic, right, blocks a shot by Montenegro's Aleksandar Ivovic (9) during a preliminary round men's water polo match at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo, Japan. (AP Photo/Mark Humphrey)

Croatia's Maro Jokovic (5) passes the ball over Spain's Alejandro Bustos Sanchez (12) during a preliminary round men's water polo match at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo, Japan. (AP Photo/Mark Humphrey)