Ariarne Titmus has made it two from two against Katie Ledecky after winning her second gold medal in the 200m freestyle at the Tokyo Olympics.
The 20-year-old Australian, who was a strong favourite going into the final against America's greatest ever female swimmer, produced another comprehensive swim to make it consecutive wins over the American legend.
It was Titmus' second gold from two events so far, with the 4x200m medley relay and 800m freestyle still to go - where she will attempt to take two more golds from Ledecky.
Titmus, who was behind for about 150m of the race, produced another incredible final 50m to produce her second Olympic record of the meet.
Ledecky didn't even medal, coming in way behind Titmus in fifth. Aussie Madison Wilson came eighth.
The medal takes Australia's gold tally to six, with four coming from Australia's superstar swimmers and two more from the men and women's rowing foursomes.
She joins 20-year-old backstroker Kaylee McKeown and the women's 4x100m relay team of Cate and Bronte Campbell, Meg Harris and Emma McKeon as the nation's golden girls so far.
The 200m and 400m freestyle were Titmus' strongest events, but she is expected to medal for her remaining two.
Ariarne Titmus has made it two from two against Katie Ledecky after winning her second gold medal in the 200m freestyle at the Tokyo Olympics
Titmus, who was behind for about 150m of the race, produced another incredible final 50m to produce her second Olympic record of the meet
Titmus' opening 100m saw her outside of medal positions, but the Aussie is known for her lightning finishes.
She and Ledecky both trailed as they came into the second half of the race, with Titmus turning on the afterburners as she turned with one change to go.
The 20-year-old turned in another incredible final 50m to claim her second gold from two events.
Her coach Dean Boxall, who went viral with his celebration after her stunning win in the 400m freestyle, couldn't contain himself again.
The long blonde-haired swimming coach ran down the stands screaming and fist pumping as Titmus came in for her second gold.
