RIO 2016: What you missed overnight including Bolt's "walk" in the park
Aussies in action
Australian discus thrower Dani Samuels has finished fourth in the Olympic final.
It was her best result at a Games for Samuels but she was still disappointed to miss out on a medal.
"I'm finding words a little hard to process right now," she said.
"I've come ninth in an Olympics and just missed a final and come fourth and just missed a medal.
"I'll be back for Tokyo as it's the only medal I don't have."
Croatia's Sandra Perkovic won gold with a throw of 69.21m.
Melina Robert-Michon of France won silver with 66.73m, while Denia Caballero of Cuba won bronze with 65.34m.
There was good news for Queensland's Alana Boyd, who qualified for Saturday's women's pole vault final.
Boyd cleared 4.45m and 4.55m at the first attempt and then passed at 4.60m but she had already done enough.
The Australian trio of Eloise Wellings, Genevieve LaCaze and Madeline Hills qualified for the final of the women's 5000m.
Ryan Gregson (men's 1500m) also progressed to the semi-finals but Luke Mathews (men's 1500m), Alexander Hartmann (men's 200m) and Michelle Jenneke (women's 100m hurdles) all missed out.
Bolt breezes into 200m semis
Usain Bolt is still on track for a triple sprint double at the Olympics after cruising into the semi-finals of the men's 200m on Wednesday.
The Jamaican was in cruise control and barely got out of first gear, winning his heat in 20.28 seconds.
"I hate mornings and happy to get this out of the way," Bolt said.
"It's because it's my favourite event that I get nervous.
"I never want to lose or make a mistake, but I'm happy."
Two more Jamaicans were among the quickest in qualifying, with London 2012 silver medallist Yohan Blake running 20.13 and Nickel Ashmeade finishing in 20.15.
American Justin Gatlin, who took silver in the 100m, eased home in 20.42 for the semis on Thursday morning before Friday morning's final.
Tom Burton has won Australia's first sailing gold medal of the Rio 2016 Olympic Games after a superb comeback in the men's laser medal race.
There was more success on the water with Aussies Jason Waterhouse and Lisa Darmanin taking silver in the Nacra 17s.
Australia's Ashley Stoddart has finished ninth in the Laser Radial class.
She finished equal second in the medal race but it wasn't enough to move up the rankings.
The Netherlands' Marit Bouwmeester won gold, Ireland's Annalise Murphy silver and Denmark's Anne-Marie Rindom took out bronze.
Sprint kayaker Murray Stewart has just missed out on a medal in the men's K1 1000m.
Stewart was in front with 250 metres remaining but was caught and passed before finishing fourth.
Olympic debutants Alyce Burnett and Alyssa Bull finished eighth in their A-Final in the women's K2 500m.
Veteran Aussie Martin Marinov contested the B-Final of the men's C1 1000m and finished in eighth.
Australia is out of the team showjumping.
The team of Edwina Tops-Alexander, Matt Williams and Scott Keach needed to be in the top eight to qualify for the next stage but could not manage it.
There was better news in the individual competition with both Tops-Alexander and Williams moving through.
Keach, whose only other Games' participation was in 1988, did not qualify.
The third jumping qualifier begins on Wednesday (11pm AEST).
Australia's Grant Nel has finished 15th in the men's 3m springboard semi-final.
The result was not enough to qualify for the final.