Already rated one of swimming’s all-time greats coming into the Paris Olympics, Katie Ledecky made it official by storming to victory in her signature event, the 800-metre freestyle,  to end her work in the French capital in great style.

French torpedo Leon Marchand may be the prince of Paris, electrifying the home nation with four spectacular gold medals, but it is Ledecky writing her name in the record books after she claimed her ninth gold, equalling Soviet gymnast Larisa Latynina for the most by any woman in any Olympic sport.

In sharp contrast to Ledecky’s runaway win in the 1,500-metre, the 800-metre freestyle on Saturday was a thriller from start to finish, with Ariarne Titmus matching her stroke-for-stroke for almost the entire distance.

But with the American setting a relentless, grinding pace, her great Australian rival would never get her nose in front, settling for silver as Ledecky got to the wall first in a time of 8 minutes, 11.04 seconds.

Paige Madden took bronze for the United States.

It is the fourth time Ledecky has won the 800-metre freestyle and she joins compatriot Michael Phelps as the only swimmer to win gold in four different Olympics.

The 800-metre was the final event on Ledecky’s Paris card and she returns home having added two golds, a silver and a bronze, bringing her Olympic stockpile to 14 medals in all – with more possible. The 27-year-old has hinted that a home Olympics in Los Angeles in four years is on her mind.

And in a passing of the baton moment, Canada’s Summer McIntosh enhanced her status as the rising star of women’s swimming by winning her third gold medal of the games in the 200-metre individual medley.

The 17-year-old produced a brilliant late surge to win in a time of 2min 06.56sec, the third-fastest time in history.

Kate Douglass of the USA finished second to take silver while Australian Kaylee McKeown took the bronze after American Alex Walsh, who had finished third, was disqualified.

McIntosh had already claimed gold in the 400-metre individual medley and the 200-metre butterfly, as well as a silver in the 400-metre freestyle.

“It’s pretty surreal. I’m just so proud of myself, how I’ve been able to recover and manage the events because it is a lot,” said the teenager, who also won silver in the 400-metre freestyle during what has been an intense games for her.

“The reason I’m able to do this just because of all the hard work and dedication I’ve given to this moment along with all my family and my teammates and my coaches, and I’ve also worked so hard for me to be here today,” she said.

The Canadian said she knew that she had to pull out all the stops to secure her latest win.

Earlier, Hungarian powerhouse Kristof Milak stormed to a second Olympic gold with victory in a thrilling men’s 100-metre butterfly final, while adding to the silver medal he won in the 200-metre event at the Paris Games.

Three years after claiming the 200-metre gold at Tokyo, the 24-year-old secured the shorter of the two Olympic butterfly titles by touching the wall in 49.90, 0.09 seconds ahead of Canadian runner-up Josh Liendo.

Ilya Kharun grabbed a second bronze for Canada, having also taken one in the 200-metre butterfly in Paris.

Now boasting four Olympic medals, Milak gave Hungary a second gold in the Paris meet following Hubert Kos’s 200-metre backstroke title.

In the final race of the night in the pool, the United States broke the world record in winning the 4×100-metre mixed medley relay gold, outgunning China and Australia.

Their team of Ryan Murphy, Nic Fink, Gretchen Walsh and Torri Huske touched in 3min 37.43sec to narrowly better the mark set by Britain at the Tokyo Games, when the event was first added to the Olympic programme.

China’s Zhang Yufei took silver in 3:37.55, with Australia filling the podium in 3:38.76.

It is only the second world record in the pool in Paris after China’s Pan Zhanle smashed the men’s 100-metre freestyle best.

Teams in the mixed medley comprise two women and two men, with each of the four swimmers allocated to one of the four traditional medley strokes – backstroke, breaststroke, butterfly and freestyle.

The United States chose to lead off with Murphy up against China’s Xu Jiayu, while Australia opted for Kaylee McKeown.

Both Fink and Walsh then swam storming legs before Huske brought it home with China’s Yang Junxuan and Australia’s Mollie O’Callaghan in hot pursuit.