Tom Dean has remarkably won gold and Duncan Scott silver to ensure a British one-two in the men's 200m freestyle final.
Dean, who was positioned third after the first 100m, emerged victorious with a time of 1:44.22.
World number one Scott finished in 1:44.26 and Brazil's Fernando Scheffer took bronze with a time of 1:44.66.
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Hwang Sunwoo and David Popovici started strong with Scott sandwiched between the two in second after the first 50m.
Dean then pushed into third and +0.68 behind Hwang after 100m. But Scott turned the jets on and burst ahead in the final 100m alongside Dean and the two broke away in the final 50m.
It ended up being a clear and incredibly close battle between Dean and Scott in the last 15m with both finishing as medalists.
Dean teared up as he went to pick up a shock gold medal and called it a "dream come true".
"It's a dream come true," he told Eurosport. "But at the same time knowing how strong GB has been in the event the last four or five years it's kind of not a surprise.
"Tom is a class act and we've got so many other great guys and I think everyone can take pride in this event in Great Britain."

‘Not surprised!’ – Dean on remarkable Team GB 'dream' one-two

Scott said: "Yesterday was about trying to move on from the heats. It was a difficult back-to-back the evening heats and the morning semi.
"We got through the rounds really well, we navigated it well and we weren't really too surprised by yesterday morning because that's just the way me and Dean do our business.
"We were satisfied with our place and it was always going to be a tough race this morning.
A one-two is the best possible outcome for us so we're buzzing for that.
Straight after the race, Lizzie Simmonds said on commentary: "I do not believe what I have just seen, Tom Dean Olympic champion!"
"That is absolutely astounding. I thought Hwang was out there, Dean was holding on and was still making his move in the last 50m. Even on the finish it looked like Duncan had got it. Unbelievable!"

Peaty dominates to take gold, Ledecky stunned - Morning Update

JACOBY, 17, WINS SHOCK GOLD

American 17-year-old Lydia Jacoby finished strongly to win 100m breaststroke gold having trailed in third after the first 50m. The teenager recorded a winning time of 1:04.95 with South Africa's Tatjana Schoenmaker having to settle for silver (1:05.22). Lilly King, also from USA, took bronze (1:05.54).

‘She came from nowhere!’ – Jacoby, 17, shocks world to claim 100m breaststroke gold

Ariarne Titmus, who beat USA's Katie Ledecky in the 400m freestyle on Monday, won the first of the two 200m freestyle semi-finals, waiting until the last quarter of the race to make her move and finished in a time of 1:54.82 which was fastest overall.
Five-time Olympic gold medalist Ledecky recorded the third fastest time of 1:55.34 as she also trailed Siobhan Bernadette Haughey from Hong Kong who finished in 1:55.16.
Freya Anderson (Team GB) missed out on the 200m freestyle final after coming seventh in the second semi-final.
British duo Abbie Wood and Alicia Wilson have both qualified for the 200m individual medley final. Wood (2:09.56) came second overall behind USA's Kate Douglass (2:09.21) while Wilson snuck into eighth position (2:10.59).
Australia's Kaylee McKeown recorded an Olympic record time of 57.47 seconds to win the 100m backstroke. Canada's Kylie Masse took silver (57.72) and USA's Regan Smith grabbed bronze (58.05).
ROC's Evgeny Rylov took gold in the 100m backstroke (51.98) with compatriot Kliment Kolesnikov closely behind to take silver (52.00). USA's Ryan Murphy finished in bronze position in a time of 52.19.
Chad Le Clos of South Africa looked at one point to be closing in on the world record in the 200m butterfly semi-final, but instead he had to settle for the third fastest time across both semis with a time of 1:55.06. Hungary's Kristof Milak was quickest (1:52.22).
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