Cam McEvoy has carved more slices of swimming history with a powerhouse victory in the men's 50m freestyle at the world titles.
McEvoy, 31, triumphed on Saturday night in Singapore to become Australia's oldest gold medallist at a swimming world championships.
His feat overshadowed fellow Australian Kaylee McKeown completing her golden backstroke double with a victory over 200m.
Exactly 12 months after both won Olympic gold in the events, the repeat was particularly compelling for McEvoy, the first Australian man to twice win 50m freestyle world titles.
Following his 2023 victory in Japan and silver last year in Qatar, McEvoy clocked 21.14 seconds in Singapore to prevail ahead of Great Britain's Ben Proud (21.26) and American Jack Alexy (21.46).
McEvoy became a father for the first time three weeks ago when his wife Maddi gave birth to a son, Hartley.
"It has given me a new light on the sport, on life, something new to navigate," McEvoy said.
"And I'll see where it takes me in the future.
"It's unreal. It's been a pretty hectic preparation, I'm just glad that I got my hand on the wall first in a great time."
McKeown enhanced her status as the world's best female backstroker with her 200m gold medal, which follows her earlier win over 100m.
The Queenslander was challenged by American Regan Smith but touched first in two minutes 03.33 seconds, 0.96 seconds ahead of her rival.
"I wasn't feeling too great heading in, a bit of illness and stuff going around, dealing with a bit of a shoulder (injury)," said McKeown, who dislocated a shoulder leading into the worlds.
"I dug really deep."
Also on Saturday night, Australia's Lani Pallister collected silver in a gripping women's 800m freestyle won by American legend Katie Ledecky.
Pallister challenged the greatest distance swimmer in history with a brave display, lopping almost five seconds off her personal best to finish in 8:05.95, just 0.36 behind Ledecky.
Australia's Alexandria Perkins claimed silver in the women's 50m butterfly and Matt Temple was fifth in the men's 100m butterfly final.
Meg Harris was third-fastest qualifier for Sunday night's women's 50m freestyle but the Australia's youngest team member, 16-year-old Sienna Toohey, failed to advance from the women's 50m breaststroke semi-finals.
Australia (seven gold, four silver, six bronze) enter Sunday's last night of competition in second spot on the medal tally behind the United States (seven, 11, seven).
