Australia has had a golden night in the pool at Rio, with Kyle Chalmers winning a gripping men's 100-metre freestyle final.
Chalmers, an 18-year-old making his Olympic debut, clocked 47.58 seconds after trailing down the first 50m straight to become the first Australian to win the Olympic blue riband event since Michael Wenden in 1968.
Belgium's Pieter Timmers finished second, defending Olympic champion Nathan Adrian from the US came third, while fellow Aussie Cameron McEvoy came in seventh.
Australia also won its first silver medals of the Rio games in the pool.
Australia's women's 4x200m freestyle relay team won silver, finishing behind gold-medallists the United States, with Canada third.
The team of Emma McKeon, Tasmin Cook, Leah Neale and Bronte Barratt brought home Australia's third consecutive Olympic medal in the event, following silver in London four years ago and gold in Beijing in 2008.
Madeline Groves picked up Australia's first silver medal of the Rio Olympics in the final of the women's 200-metre butterfly.
Groves swum a personal best time at her first Olympics to just be edged out by Spain's Mireia Belmonte.
Brianna Throssell, Australia's other entrant in the final, came in eighth place.
Meanwhile, Cate Campbell and her sister Bronte are both through to tomorrow's women's 100-metre freestyle final.
Cate easily won her heat, breaking the Olympic record for the second time today, while Bronte cruised through in second place in her heat.
There was some heartbreak for Australia today though, with the men's basketball team losing to the US dream team 98-88 in their group clash.
The US has had no trouble putting away China and Venezuela in their first two matches, but the Boomers made them put in extra effort for their third straight win of the Games.
Patty Mills finished with 30 points and Andrew Bogut added 15, while Matthew Dellavedova had 11 points plus 11 assists and six rebounds.
Australia also lost its rugby sevens quarter-final to South Africa 22-5 at Deodoro Stadium.
The Aussies earlier defeated the highly-favoured Blitzbokke in a pool game but were unable to replicate the feat in the knockout match.
The Kookaburras had their first win of the Games, edging out Great Britain 2-1 in their group stage hockey match.