Australia has won gold in the women's 4x100-metres medley as the Tokyo swim team becomes the nation's most successful at any Olympics.
The triumph of Kaylee McKeown, Chelsea Hodges, Emma McKeon, Cate Campbell in Sunday's final gives Australia's swim team nine golds in Tokyo, bettering the previous record of eight at the 1956 Melbourne Games.
And the 21 swimming medals overall in Tokyo is one more than Australia's previous benchmark at the pool from the 2008 Beijing Games.
Australia won Sunday's medley relay in three minutes 51.60 seconds with the United States (3:51.73) taking the silver medal and Canada (3:52.60) the bronze.
McKeon collects a fourth gold of the Tokyo Games - the only Australian to win four golds at the one Olympics.
And McKeon now has 11 Olympic medals in her career, two more than Ian Thorpe and Leisel Jones.
Backstroker McKeown wins her third gold and Campbell her second of the Games and fourth in her Olympic career, while breaststroker Hodges takes her first gold.
In the final, the Australians were second behind the United States for the initial three legs.
Campbell then produced a sizzling last freestyle leg of 52.11 seconds to overtake the Americans and then hold on in a desperate final five metres.
