American powerhouse Caeleb Dressel won his third gold medal of the Olympics in world record style.
He smashed his own world record to win the men’s Olympic 100m butterfly. The two-time world champion won in 49.45s to better his own world best 49.50s set at the 2019 world championships.
Hungarian 200m butterfly champion Kristof Milak was second in 49.68s – only the fourth man ever to go under 50s – and Noe Ponti of Switzerland third in 50.74s
Dressel was already half a body length ahead at the turn from Milak and Minakov of the ROC.
The American swimmer had also set the third-fastest time ever in the heats.
It was the fourth new world record in the Tokyo pool, and the second individual one after South Africa’s Tatjana Schoenmaker crushed the long-standing 200m breaststroke mark on Friday.
Australia’s women set a new benchmark in the 4x100m relay, as did China in the women’s 4x200m relay.
Dressel remains on track for possible six gold medals, having already won the 100m freestyle crown and helped the US team clinch the 4x100m relay title.
He is expected to later on Saturday contest the 4x100m mixed medley relay final and is the undisputed favourite in the 50m freestyle final on Sunday.
Dressel is also expected to swim the 4x100m men’s medley relay on Sunday, the final event in the Tokyo pool.
Earlier, in the second semi-final heat of the women’s 50m freestyle, Australia’s Emma McKeon clocked 24.00 seconds flat to lower her own previous mark of 24.02 from heats.
In the women’s 200 backstroke, Kaylee McKeown of Australia won the gold in 2:04.68,
Canadian Kylie Masse was the fastest into the pool, and led at 50. She was about half of a body length ahead of McKeown at halfway, and continued t build the lead.
McKeown has turned on the jets at the last length to take an improbable win. Masse settled for the silver for Masse and bronze in her fourth Olympic Games went to another Australia Emily Seebohm.
Katie Ledecky of the USA won the women’s 800m free in 8:12.57 ahead of Australian Ariarne Titmus. Simona Quadarella of Italy was third.
And in the inaugural mixed 4x100m medley relay, it was the team from Great Britain that won the gold in a new world record 3:37.58!
Silver went to China while Australia took the bronze.