An Olympic water polo match between Brazil and South Africa in progress at the Olympic swimming pool in Helsinki. (Photo by Keystone/Getty Images)

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Andrija Prlainovic #11 of Serbia and Marko Macan #12 of Croatia compete during the Men's Water Polo Gold Medal match between Croatia and Serbia on Day 15 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 20, 2016 in Rio de Janeiro, Brazil.

Christian Presciutti of Italy shoots during the Men's Water Polo Bronze Medal match between the Montenegro and Italy on Day 14 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 20, 2016 in Rio de Janeiro, Brazil.

Antonio Petrovic of Montenegro controls of the ball during the Men's Water Polo Bronze Medal match between the Montenegro and Italy on Day 15 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 20, 2016 in Rio de Janeiro, Brazil.

Marko Macan #12 of Croatia throws the ball during the Men's Water Polo Gold Medal match between Croatia and Serbia on Day 15 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 20, 2016 in Rio de Janeiro, Brazil.

Members of the 2016 Australian Olympic Women's Water Polo Team during a training session at the Olympics Aquatics Stadium on August 3, 2016 in Rio de Janeiro, Brazil.

Members of the 2016 Australian Olympic Women's Water Polo Team during a training session at the Olympics Aquatics Stadium on August 3, 2016 in Rio de Janeiro, Brazil

Makenzie Fischer #11 of United States and Francesca Pomeri #10 of Italy compete during the Women's Water Polo Gold Medal match between the United States and Italy on Day 14 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 19, 2016 in Rio de Janeiro, Brazil.

Maddie Musselman #2 of United States in action during the Women's Water Polo Gold Medal Classification match between the United States and Italy on Day 14 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 19, 2016 in Rio de Janeiro, Brazil.