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The pool was where the action was at on Day 5 of the Tokyo Olympics.
At the Tatsumi Water Polo Centre, the U.S. women's water polo and its roster of Southern Californians took on Hungary. It's another step on the team's quest for a third-straight gold medal.
And at the Tokyo Aquatics Centre, U.S. swimmer Katie Ledecky took gold in the grueling 1500m freestyle after failing to medal in the 200m free.
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The U.S. women's 3x3 basketball team also made history after facing off against the ROC in the finals.
Scroll down to dive into four storylines to watch on Day 5 of the Tokyo Olympics.
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SoCal Stars and the U.S. Women’s Water Polo Team Fall to Hungary in Third Preliminary Game
The U.S. Women's water polo team suffered its first loss of the Tokyo Olympics in a tightly contested game against Hungary, 10-9.
Hungary's Rebecca Parkes scored three goals including the game clincher with 45 seconds left to put her team up for good.
Maddie Musselman led the U.S. in scoring with three goals and Rachel Fattal was the second-leading scorer with two goals.
Ashleigh Johnson made nine saves on 19 shots.
The U.S. will play the Russian Olympic Committee on Friday, July 30 and has already clinched a spot in the quarterfinal on Aug. 3
The SoCal women's water polo delegation includes Aria Fischer (Laguna Beach), Makenzie Fischer (Laguna Beach), Rachel Fattal (Seal Beach), Kaleigh Gilchrist (Newport Beach), Paige Hauschild (USC), Stephania Haralabidis (Corona del Mar), Ashleigh Johnson (Seal Beach), Amanda Longan (Moorpark), Maddie Musselman (Newport Beach), Maggie Steffens (Long Beach) and Alys Williams (Huntington Beach).
Watch the matchup on NBC, or stream live.
TV channel: NBC
Katie Ledecky and Team USA Swim Earn Medals
Team USA has already made a splash at the aquatic center, and Tuesday night offers more opportunities to win medals.
Katie Ledecky earned a gold medal in the 1500m freestyle after failing to medal in the 200m freestyle two hours earlier. She had the top times in qualifying for both events, even setting an Olympic record in the inaugural 1500m heats.
In the women’s 200m butterfly, Alex Walsh took silver and Kate Douglass took bronze for Team USA.
The swim event Tuesday concluded with the men’s 4x200m freestyle relay final, an event where Team USA has won four straight gold medals. But the team failed to medal in a disappointing finish.
U.S. Men's Basketball Team Routs Iran
The United States responded in dominant fashion.
Coming off its first loss since 2004 after falling to France on Sunday, the U.S. returned to form against Iran during a 120-66 win.
The shooting woes that hampered the U.S. against France were non-existent against Iran, as Team USA shot 55.3 percent from the field and connected on 19 threes. Damian Lillard went 7-for-13 from 3 to lead the United States with 21 points.
Kevin Durant had 10 points, five rebounds, five assists, three blocks and two steals. Durant, participating in his third Olympic Games, now sits just six points behind Carmelo Anthony (336 points) as Team U.S.A's all-time leading scorer.
Devin Booker, who was inserted into the starting lineup over Zach LaVine, added 16 points as six U.S. players finished in double figures.
Watch the game on Peacock, or stream live.
TV channel: Peacock
Team USA 3x3 Basketball Wins Gold
The four members of the U.S. women's 3x3 basketball team won gold and made history.
For future trivia questions asking who won the first Olympic gold medal in women's 3x3 basketball, the answer will be: Stefanie Dolson, Allisha Gray, Kelsey Plum and Jackie Young of the United States of America.
That quartet of WNBA players led the U.S. to an 18-15 victory over the Russian Olympic Committee in the first ever women's 3x3 basketball gold medal game on Wednesday.
TV channel: USA