Australia is doing a fine job backing up Wednesday's medal rush. There has already been success in the pool on Thursday, while Jess Fox will chase her second medal in Tokyo when she contests the canoe slalom later in the afternoon.
Elsewhere, the golf tees off and Australia's women's sevens team takes to the field to defend their Olympic crown.
Read on for rolling coverage of Australia's efforts at the Olympics:
Titmus sets up another Ledecky duel
Australia's golden girl Ariarne Titmus has a shot at another OIympic title against American rival Katie Ledecky.
And Titmus' teammate Kaylee McKeown is on track in her quest to also become a double gold medallist at the Tokyo Games.
Titmus, the 200m and 400m freestyle champion, will again meet Ledecky, this time in the 800m final.
And 100m backstroke gold medallist McKeown enhanced her claims for the 200m backstroke title in Thursday night's heats.
McKeown won her heat in two minutes 08.18 seconds to be fastest into the semi-finals.
Compatriot Emily Seebohm (2:09.10) was eighth-quickest.
In the 800m freestyle, Titmus and others are long odds to upset Olympic champion and world record holder Ledecky.
The American was fastest into the final in 8:15.67 with her 15-year-old teammate Katie Grimes (8:17.05) next best.
Titmus finished second in her heat and was sixth-quickest into the final in 8:18.99 with compatriot Kiah Melverton (8:20.45) seventh.
In the newly-introduced 4x100m mixed medley, Australia's team of Isaac Cooper (backstroke), 200m breaststroke gold medallist Zac Stubblety-Cook (breaststroke), Brianna Throssell (butterfly) and Bronte Campbell (freestyle) finished second behind China.
The Chinese were third-fastest qualifiers with Australia fourth in a field headed by Great Britain and the United States.
In the men's 100m butterfly, Matt Temple advanced through the heats to the semi-finals but countryman David Morgan missed out.
Barty, Peers through to mixed doubles semis
Ash Barty and John Peers have reached the final four of the Olympic mixed doubles, thriving in the deciding match tie-break to beat the Stefano Tsitsipas-powered Greece 6-4 4-6 10-6.
The Australians lifted in the deciding first-to-10 tie-break after a scrappy match from both teams, world No.4 Tsitsipas and No.19 Maria Sakkari ruing costly errors that led to the decisive break of serve in the first set.
Tsitsipas came from 0-30 on serve to close out the second set, but Australia shone in the match tie-break, a reflex volley from doubles specialist Peers the catalyst as they went from 2-2 to an 8-4 lead.
Fresh off her Wimbledon title, world No.1 Barty had endured a forgettable Tokyo campaign when she lost her first-round singles match and then a tight women's doubles quarter-final with Storm Sanders on Wednesday.
But it could be third time lucky in her pursuit of Olympic gold, alongside long-time friend and doubles specialist Peers.
They will play Russian duo Anastasia Pavlyuchenkova and Andrey Rublev for a spot in the gold medal match, while a loss will see them fighting for bronze.
Peers and Barty have long been friends, playing together before Barty took a break from tennis and then even living with the Peers family when she returned to the sport in 2016.
"For Johnny and I this is a really, really special moment to make Mama Peers proud," Barty said ahead of their campaign on Wednesday.
Women's sevens begin title defence in style
The Australian women's sevens team have backed up their huge opening pool win with another big 26-10 win over China.
Australia made a strong start to their campaign when they defeated Japan 48-0 at Tokyo Stadium earlier in the morning.
Pushed early in their second match, China sneaked onto the board first with a runaway try, before Australia hit back quickly through a Sharni Williams runs that broke through the defence and saw her dot the ball under the posts.
Australia would add another before the halftime hooter.
It would be all Australia early in the second as they continued to push China's defence, adding another two tries to their tally, but they wouldn't be able to keep China out in the final seconds.
Australia face their biggest test in the USA on Friday morning.
Serbia feed on Sharks in men's water polo
Reigning men's Olympic water polo champions Serbia have taken Australia apart early before completing a regulation 14-8 win.
The Sharks' major upset of Croatia two days earlier was a distant memory in Thursday night's late game.
Australia were caught napping and were belted 6-0 in the first quarter.
Coach Elvis Fatovic called a timeout at 4-0 and gave his team a stern talk, but it had little effect.
The Sharks conceded another goal to start the second quarter before opening their account.
They were down 10-1 at halftime and 11-3 at the last break.
Australia stopped the rot in the last quarter, outscoring Serbia 5-3, but the damage was done and they never looked capable of a miracle comeback.
The Sharks dropped to equal fourth in Pool B with a 1-2 record and they will have no relief with their next opponent.
On Saturday they play Spain, who lead their group with a 3-0 record.
Serbia took full toll of Australian fouls, scoring six goals from seven attempts with power plays, while the Sharks' return was only four from nine.
Goalkeeper Branislav Mitrovic also had a strong game with eight saves.
Dusan Mandic racked up four goals from five attempts to lead the Serbian scoring, while Blake Edwards scored two for Australia.
Jess Fox claims inaugural women's C1 gold
Australian slalom star Jessica Fox has won the first C1 Olympic gold medal on offer, storming to victory in Toyko.
Fox won bronze in the kayak event on Tuesday after starting favourite but clinched her first Olympic gold medal, and fourth overall with her C1 run.
With the C1 added to the Olympic program for the first time, Fox charged through the whitewater course in 105.04 seconds.
Britain's Mallory Franklin was second and Germany's reigning world champion Andrea Herzog took the bronze.
Entire Australia track & field team released from isolation
Australia's entire track and field team have been released from isolation and are free to train as normal following a precautionary measure.
The entire team was forced into isolation after United State's pole vaulter Sam Kendricks' tested positive and subsequently withdrew from competition. Australia's three close contacts have all tested negative after they self-reported their brief contact with the US athletics team.
"Once again, abundant caution and our strict protocols continue to keep the Team safe. We will continue to be very thorough in our observance of the Tokyo playbooks and our own additional measures," Australian Olympic Team Chef de Mission Ian Chesterman said.
"We want every Australian athlete to be in a position to have their Olympic moment. We will continue to be vigilant."
All 54 members of the track and field team including 41 athletes and 13 officials, were given permission to leave their rooms a little over two hours after they were sent into isolation.
Aussie shooters miss out on medals
Australian shooter Laetisha Scanlan has fallen one target short of a medal, finishing fourth in the Tokyo Olympics women's trap final.
Smith and Scanlan both qualified for the six-shooter final, having been picked for these Games ahead of Rio 2016 champion Catherine Skinner after a competitive selection process.
Smith placed sixth in Thursday's medal-deciding contest, with a score of 13/25 in the first phase ending her day at the Asaka range.
Scanlan was ousted in heartbreaking fashion moments later, missing her final target to finish level with San Marino's Alessandra Perilli on 26/35.
Perilli advanced because of her higher ranking in qualification.
China upstage Australia, U.S. in freestyle relay
Australia have taken bronze in the women's 4x200m freestyle relay.
The Aussies were the fastest qualifiers through to the final, but completely changed up their team bringing in four new swimmers including Ariarne Titmus and Emma McKeon.
But even with the improved squad, the Aussies were upstaged by China and the fast-finishing Americans, led by Katie Ledecky.
The bronze medal closed out yet another fantastic session in the pool for Australia, with Izaac Stubblety-Cook and Kyle Chalmers taking gold and silver earlier in the day respectively.
Aussies overcome BMX chaos to advance to semis
Australian Saya Sakakibara has rallied from an early mistake to qualify for the Olympic BMX racing semifinals with a last-gasp win.
It was a turbulent opening day of competition for the Australians, with Lauren Reynolds also qualifying for Friday's semis, but Anthony Dean crashing early and then finishing last overall in his quarterfinal heat to drop out of contention.
Sakakibara and Reynolds were in the same heat on Thursday at Ariake Urban Sports Park.
In Thursday's opening quarters, the competitors were divided into heats of six riders and had three rounds of races. The top four in each heat progressed to Friday's semifinals, with the medal race to follow.
Chalmers pipped for gold in freestyle thriller
Swimmer Kyle Chalmers has taken the silver medal in the 100-metres freestyle, falling a finger-nail short of defending his Olympic title.
Chalmers won the silver medal in Thursday's final at the Tokyo Games follows his gold medal in the event at the 2016 Rio Olympics.
The South Australian was 0.06 seconds behind American Caleb Dressel, who won in 47.02 seconds, with Russia's Kliment Kolisnikov (47.44) third.
Chalmers (47.08) unleashed his renowned late surge, coming from third at the turn to draw level with Dressel.
But in a desperate lunge, the American rallied to touch out the South Australian.
"I did everything in my absolute power to win," Chalmers told the Seven Network.
"I executed the race well ... I left absolutely everything in the pool."
The Adelaide-based flyer was seeking to become the first Australian to claim double gold in the highly-anticipated event.
Stubblety-Cook adds another Aussie gold in the pool
Izaac Stubblety-Cook has won Australia's seventh gold in Tokyo, and fifth in the pool, taking out the men's 200m breaststroke final with an Olympic record.
Stubblety-Cook finished over the top of the Netherlands' Arno Kamminga and Finland's Matti Mattson to claim gold in a time of 2:06.68.
Competing at his first Olympics, the 22-year-old improved his placing at each turn and then relied on his strong closing 50 to continue Australia's excellent run in the pool in Tokyo.
McKeon, Campbell safely through to women's freestyle final
Australia's Emma McKeon has underlined her favouritism for the women's 100m freestyle final with another blistering swim.
McKeon clocked a time of 52.32 to be the fastest qualifier through to Friday's final, while compatriot and Australia flag bearer Cate Campbell was third fastest after a 52.71 in the first semifinal.
Hong Kong's Bernadette Siobhan Haughey split the two Australians, her 52.40 making her McKeon's biggest rival in the hunt for gold.
McLoughlin finishes fifth in men's 800m freestyle
Australia's Jack McLoughlin has finished fifth in the first ever men's 800m freestyle final at the Olympics, the race taken out by American Robert Finke.
McLoughlin turned in sixth for the final lap, but he improved his position to add a fifth place to his silver medal from the 400m freestyle earlier in the week.
New Zealand wins its first gold
Rowers Grace Prendergast and Kerri Gowler have won New Zealand's first gold in Tokyo, taking out the women's pair at the Sea Forest Waterway on Thursday morning.
The crew entered the race as red-hot favourites having set a new world and Olympic record on Wednesday and held their nerve in the final to edge out the Russian Olympic Committee and Canada in a time of 6:50.19.
Chalmers aims to join pool medal party
Swimmer Kyle Chalmers is seeking a slice of Australian Olympic history when he defends his 100m freestyle title in Tokyo (12:37pm AEST).
Chalmers was sixth-fastest qualifier for Thursday's final as he aims to extend Australia's bouyant mood.
He has the chance to become the first Australian to win two Olympic gold medals in the men's event.
Australia begins Thursday's competition in fifth spot on the medal table with six gold, one silver and nine bronze.
Chalmers is the only Australian defending an individual title in Tokyo and emerged from his semi-final with confidence.
"I've always delivered at the end of the competition," he said.
Chalmers' teammate Zac Stubblety-Cook (200m breaststroke - 11:44am AEST) and the women's 4x200m freestyle relay combination (1:30pm AEST) also carries gold medal hopes into Thursday.
Ash Barty and John Peers are the last Australian hopes in tennis, with the mixed doubles pair to face Maria Sakkari and Stefanos Tsitsipas of Greece in the quarter-finals (after 4pm AEST).
Elsewhere in competition, trap shooters Laetisha Scanlan and Penny Smith are well-placed to qualify for their final.
Scanlan is fifth and Smith holds sixth place for the next two qualifying rounds (10am AEST), with the top six through to the final later on Thursday.
The women's rugby sevens team start their Olympic gold medal defence on Thursday (11:30am AEST), with games against the host nation and China (6:30pm AEST).
K1 canoe bronze medallist Jessica Fox has qualified fifth-fastest in new women's event the C1 ahead of Thursday's semi-finals (3:39pm AEST) and medal races (4:55pm AEST), while Lucian Delfour is third going into the business end of the men's K1.
The unbeaten Hockeyroos can strengthen their hold of top spot in Group B when they play second-placed New Zealand in women's hockey (10:15pm AEST).
Marc Leishman and Cameron Smith tee off in the opening round of men's golf (9am AEST) and the Sharks play Serbia in men's water polo (8:50am AEST).
Saya Sakakibara will lack nothing for inspiration when she rides in the opening rounds of BMX racing (11:21am AEST).
Her brother Kai was on the way to qualifying for Tokyo in the same sport when he crashed heavily in a race and was put into a coma with traumatic head injuries.
Kai is in Tokyo to support his sister and his remarkable recovery has progressed to him being able to ride a bike again.
Anthony Dean and Lauren Reynolds will also compete in the BMX racing.