Titmus vs Ledecky 4.0, Ash Barty plays Novak Djokovic in the doubles and the fastest men and women in the world hit the track - Everything you need to know for Day 8 of the Tokyo Olympics
Ariarne Titmus and Katie Ledecky reignite their rivalry for the fourth and final time on Saturday as they battle for the women's 800m freestyle.
Titmus has won both individual events against America's greatest ever female swimmer so far, taking gold in the 200m and 400m freestyle.
The USA star produced a stunning anchor leg of the women's 4x200m relay to overtake Australia for silver but dominates the longer races, comfortably winning the 1500m earlier these Olympics.
It will be the final time Titmus swims at the Tokyo Games which have made her a household name in Australia and around the world.
Teammate Kaylee McKeown, who won the hearts of Aussies with a charming interview following her 100m backstroke gold, is back in the pool chasing more medals in the 200m backstroke alongside veteran Emily Seebohm.
Australia will also compete for the 4x100m mixed medley on Day 8 of the Olympic Games.
The world's best male and female tennis player will face off as well as Australia's Ash Barty plays Serbia's Novak Djokovic for the bronze medal in the mixed doubles.
Golden girl: Titmus beams as she holds up the gold medal for the women's 400m freestyle
Titmus' teammate Kaylee McKeown is on track in her quest to also become a double gold medallist at the Tokyo Games
Rohan Browning will run from 9:45pm in the 100m sprint - he holds the third-fastest time by any Australian in history
AUSTRALIA AT THE OLYMPICS - DAY 8
11:10am - BMX freestyle - Natalya Diehm and Logan Martin
11:30am - Men's 100m butterfly final - Matthew Temple
11:37am - Women's 200m backstroke final - Kaylee McKeown
11:46am - Women's 800m freestyle final - Ariarne Titmus
11:53am - Women's 100m hurdles - Liz Clay
12:43pm - Mixed 4x100m medley relay
12:45pm - Men's hockey
4pm - Mixed doubles tennis bronze medal match
6:20pm - Men's basketball
8:45pm - Men's 100m - Rohan Browning
9:15pm - Men's discus - Matthew Denny
The nation's athletes, led by the swimmers, currently have Australia sitting fifth on the medal tally - with nine golds already surpassing the eight it achieved at Rio.
The athletics kicks into full gear, with the final of the women's 100m up on Saturday while the men start the heats to earn the title of the fastest person on earth.
Rohan Browning will run from 9:45pm who holds the third-fastest time by an Australian in history.
Aussie Matthew Denny will fight for gold in the men's discus after recording the third-best throw of his group on Friday.
Liz Clay will battle for the 100m hurdles after posting fantastic times in the lead up to the Games.
The Boomers are back in action against Germany after winning their first two games of the Olympics.
Friday's news they will be without NBA center Aron Baynes for the remainder of the competition was unwelcome news for Australia's medal chances but they will be looking to move into the knockout stages with another comprehensive victory.
Ash Barty and her mixed doubles partner John Peers will face the world's best tennis player Novak Djokovic and Serbia for the bronze medal.
The women's world no.1 went down to Russia on Friday, meaning she will go home without a gold medal in a disappointing display from the Wimbledon champion.
The world's best male and female tennis player will face off as well as Australia's Ash Barty plays Serbia's Novak Djokovic for the bronze medal in the mixed doubles
The Hockeyroos play Argentina in their final pool match but three wins from three games mean they are already through to the quarter-finals regardless of the result
Over at the BMX track there will be two Aussies fighting for the new freestyle event that will see the world's best riders producing trick sides similar to the skating.
Natalya Diehm and Logan Martin are Australia's medal hopes in the event.
The Hockeyroos play Argentina in their final pool match but three wins from three games mean they are already through to the quarter-finals regardless of the result.
There will be four Australians in play for the first ever mixed triathlon, with Aussies also in play in the sailing, shooting and archery.
The golf is set to continue after being delayed on Friday due to bad weather.
Cameron Smith mounted a big comeback before the poor weather, he sits seven shots off the pace.
The Sharks play Spain in there second-last men's water polo match looking for a place in the knockount rounds.
The Australian women's 7s team were unable to defend their gold medal, losing their last two games.
They will play Russia for the 5th-8th seeding game.