This is the first time that a women's water polo team has defended its Olympic gold medal.
The U.S. has now won a medal in all five Olympics that women have played water polo.
Britain bumps Netherlands from field hockey gold • Britain stunned the top-ranked Netherlands in a shootout to win its first-ever gold medal in women's field hockey. She is also the first African-American to play Olympic water polo for the U.S. women. They've won every major global tournament their sport has to offer over the last two years, justifying their No. 1 world ranking.
Captain Maggie Steffens won her second consecutive MVP award based on her play in Rio, as voted by the media members who had been following the women's game.
Eight of the 13 players on the USA roster are under 23 years old.
With the victory, USA women's water polo claimed their second straight Olympic gold, becoming the first ever to repeat the feat.
"Italy's great, and have a lot of experience", Steffens told reporters.
His team-mate Sergio Santos, one of the longest serving players in the Brazil team, who was part of the team that had won gold at Athens 2004, was delighted to be able to announce his retirement with another gold.
Tania Di Mario is the inspirational leader of the Italians.
The United States initially appeared to claim the bronze medal, but upon further review, a botched baton handoff disqualified the team. It was also the Olympics' first all-European final.
With the USA featuring strong and unselfish play on the offensive end of the pool, the Italians needed to score goals to keep up. She shot 76 and is seven shots behind. Even after scoring 12 goals, the bulk of the US offense came from role players.
Neymar added a goal on a penalty kick in stoppage time, and Gabriel Jesus also scored twice for Brazil, which got off to a slow start in the tournament. Next up for Mike Krzyzewski's team will be either Australia or Serbia, two teams that gave them fits in pool play.
Arianna Garibotti and Roberta Bianconi have been the big names for Italy during the knockout rounds.
Next up is Italy, which advanced to Friday's final with a 12-9 victory over Russian Federation. Hungary evened the score a minute later with a goal from Krisztina Garda.
Knox scored four goals over the course of six games, each one coming in a different game.
After the game, a big contingent of US family and friends gathered in a hallway, waiting for the team to come out after showers and random drug testing. Hungary narrowed their deficit with a backhanded shot from Bujka that went right over US goalkeeper Ashleigh Johnson's shoulder.
Just as hard as the wind was seeing the name of Lydia Ko - the No. 1 player in women's golf - right behind her. What has been your favorite moment of the Rio games?
Italy's Giulia Gorlero has been just as strong, if not stronger. She's stopped 56 shots and has a 65 percent save percentage. Britain goalie Maddie Hinch did not allow a goal in the shootout.
They didn't make it look easy. It's as much of a mental challenge as it is a physical challenge. It would have been very selfish of me to let what happened to me personally effect this group. I watched a little bit of their semifinal and I saw how well they were shooting the ball from the outside.
To prevail here, the tight-knit team had to play through tragedy. "Every player, every athlete, every coach that arrive in Olympic Games want to arrive to this dream".
On Arianna Garibotti: "Arianna is a quality player".