The two swimmers who edged out Australia's Campbell sisters to tie for gold in the women's 100 metre freestyle finals have both made Olympic history.Simone Manuel, 20, became the first African-American woman to win an Olympic gold medal in a women's individual swimming event, while Canada's Penny Oleksiak, 16, became the first athlete born in the 21st century to claim Olympic gold in an individual event.
In the suspenseful race, Manuel and Oleksiak both touched the wall in 52.70 seconds, as the crowd gasped at the times flashing up on the scoreboard.
For both Oleksiak and Manuel, Rio is their first Olympic Games, and the two women were inseparable at the finish.
Sweden's Sarah Sjostrom, who took the bronze with a time of 52.99, was astonished.
"I think that was a big shock for everyone in the final," Sjostrom said.
"Everyone had to watch the result many times before we understood what happened ... the biggest surprise so far in this competition," Sjostrom said.
This medal is not just for me'Oleksiak was overjoyed as she saw the final score.
"It's amazing to tie for gold, I never thought I'd win," Oleksiak said.
"I'm only 16, so it's pretty insane to win a gold medal in your first Olympics.
"She [Manuel] deserves it as much as me."
Manuel was overcome with tears as she celebrated her victory with Oleksiak.
"This medal is not just for me, it's for some of the African-Americans that have come before me and have been inspirations to me," Manuel said.
"I think it means a lot, especially what's going on in the world today with some of the issues with police brutality. I think that this win kind of helps bring hope and change to some of the issues that are going on."Oleksiak was only seventh at the turn, but powered back on the final 50 metres with a frenzied, head-down final, 15 metres to the wall.
She has now collected four medals from Rio — the most by a Canadian at a summer Games — winning a 4x100m freestyle bronze on the opening day of the competition, followed by a 100m butterfly silver and another bronze in the 4x200m freestyle.
There was disappointment for the Campbell sisters, with world champion Bronte finishing fourth and world record holder Cate leading in world record time at the turn, but fading at the finish to sixth.
"I've always said that I didn't need a gold medal to have self-worth and I guess that that's being put to the test at the moment," Cate said.
Oleksiak and Manuel's victory was the second time the women's 100m freestyle has ended with a double gold.
The first was at the 1984 Los Angeles Games, when Americans Nancy Hogshead and Carrie Steinseifer tied at 55.92 seconds.
It came after the timing was reduced from a thousandth of a second to a hundredth, following a controversial dead-heat in the 1972 men's 400 metre individual medley when Sweden's Gunnar Larsson was awarded the gold ahead of Tim McKee of the US.
At the 2000 Sydney Games, another 21.98 second dead-heat saw Anthony Ervin of the United States and team mate Gary Hall Jr each awarded the 50m freestyle gold.