It's Australia's first gold medal for the games, setting the bar high for events to come.
Meanwhile, 21-year-old swimmer Brendon Smith won Australia's first medal in Tokyo, winning a bronze in the men's 400m individual medley final.
But that's not all that's been won today! Queensland's Jack McLoughlin has scored himself a silver medal for the men's 400m freestyle.
Our very own Emma McKeon has earned herself a place in the final of the 100m butterfly, coming second in the semi-final.
Join Tom Tilley with regular rotating co-hosts Jan Fran, Annika Smethurst and Jamila Rizvi on The Briefing, Monday - Saturday, for the day's headlines and breaking news as well as hot topics and interviews. Available on Listnr.