Swimmer Emma McKeon is on the verge of becoming another Australia double gold medallist at the Tokyo Olympics.
McKeon enters Friday's 100m freestyle final as hot favourite to win her fourth medal of the Games.
Already with gold from the 4x100m freestyle relay and bronzes in the 100m butterfly and 4x200m freestyle relay, McKeon was the quickest into the 100 free final.
Her long-time teammate Cate Campbell was third quickest - she also could join countrywoman Ariarne Titmus as a dual gold medallist with victory.
In other action as Australia seeks to add to its eight golds, two silvers and 10 bronze medals, Lucien Delfour is a big chance in the men's K1 canoe.
He qualified third-fastest for Friday's semi-finals, with the medal race to follow.
The track and field program starts on Friday and 11 Australians are in action.
Matthew Denny is aiming for a big start in the discus and is an outside medal hope.
The only athletics medal event on Friday will be the men's 10,000m, where Ugandan world record holder Joshua Cheptegei is the short-priced favourite to complete the first leg of a prospective 10,000m-5000m double.
Ash Barty and John Peers face Russian pair Andrey Rublev and Anastasia Pavlyuchenkova, the tournament's No.4 seeds, in the mixed doubles semi-finals.
The men's and women's eights will try to add to the rich Australian rowing medal haul in Tokyo on the last day of the Games regatta.
The Matildas face Great Britain in a blockbuster women's soccer quarter-final.
The women's rugby sevens team is coming off two wins when it plays the United States, ahead of the quarter-finals, while the unbeaten Kookaburras face Spain in men's hockey and the Stingers take on Spain in women's water polo.
BMX racers Saya Sakakibara and Lauren Reynolds are through to the semi-finals, with the medals also to be decided on Friday.
Jessica Pickering is the Australian entry in the women's trampoline.
Australian Associated Press