'It's go time!'published at 12:47 British Summer Time 18 August 2016
Modern Pentathlon
London 2012 silver medallist Samantha Murray starts her Rio campaign at 14:00 BST.
Summary
Usain Bolt wins 200m gold in 19.78 seconds - his eighth gold in all
Adam Gemili fourth with same time (20.12) as Lemaitre in third
GB's Eilidh Doyle last in 400m hurdles final
Gold - Jade Jones wins 57kg taekwondo gold - GB's 22nd gold
Gold - Mills & Clark win sailing's 470 women class
Gold - Alistair Brownlee wins triathlon gold and brother Jonny the silver
Silver - GB's Heath and Schofield finish second in kayak double 200m
Bronze - GB's Ellis and Langridge beat China to win badminton medal
Boxing - Nicola Adams wins -51kg semi-final to ensure at least silver
modern pentathlon 'It's go time!'published at 12:47 British Summer Time 18 August 2016
Follow all the action from Rio 2016published at 12:43 British Summer Time 18 August 2016
Plenty of GB action coming up today and you can ensure you don't miss a moment with BBC Sport.
Choose your favourite from our live guide.
Image source, BBC SportHow to follow...published at 12:37 British Summer Time 18 August 2016
Image source, .
If you've got it, flaunt it...published at 12:32 British Summer Time 18 August 2016
Gymnastics
Silver medallist on parallel bars Danell Leyva takes to the stage one last time at the traditional gala performance.
This is not your average routine...
cycling (track) Trott wants the simple life for a whilepublished at 12:26 British Summer Time 18 August 2016
Track Cycling
BBC Radio 5 LiveYesterday, Great Britain's Olympic gold medallist Laura Trott spoke to BBC Radio 5 live's Eleanor Oldroyd about her dogs, plans after Rio 2016 and fiance Jason Kenny.
"I'm going to have a break and time to myself," said the 24-year-old.
"There are so many sacrifices that we make.
"We want to be normal and take the dogs for super long walks, walk to our local pub and silly things that we just haven't done."
Media caption, GB's gold Olympian Laura Trott on her dogs, plans after Rio 2016 and fiance Jason Kenny.
golf In playpublished at 12:21 British Summer Time 18 August 2016
Golf
Yes to live sport on a Thursday afternoon. YES.
The second round of the women's golf is under way over on this link.
Britain's Charley Hull is tied for 7th at -3 and tees off at 13:14 BST, while team-mate Catriona Matthew is level par and tees off at 13:36 BST.
Image source, Getty Imagesbmx 'Don't ever give up'published at 12:15 British Summer Time 18 August 2016
BMX
Team USA's Connor Fields celebrated his return to action after a hand operation on Wednesday.
The 23-year-old has progressed to the BMX quarter-finals and rides again in the third heat Thursday (from 17:30 BST).
Get involved - your best random moment from Riopublished at 12:13 British Summer Time 18 August 2016
#RandomRio2016
Graeme Smith: The fish joining in with Katherine Grainger's final
Steve Hunter: The weightlifting. An unexpected joy and obsession!
Have you got a favourite weird/funny/random moment from the Games? Let us know via #RandomRio2016
Ouch!published at 12:10 British Summer Time 18 August 2016
Did you see the Russian diver who landed on her face yesterday?
Sport hurts!
athletics Mixed emotions for GB's Sawyerspublished at 12:05 British Summer Time 18 August 2016
Athletics
cycling (track) Meares clarifies 'head scratching'published at 11:59 British Summer Time 18 August 2016
Track Cycling
Australia's Olympic team captain Anna Meares was said to have "raised her eyebrows", external at Britain's track cycling success but she later took to Twitter, external to make it clear that she had not intended to suggest that the British team had been doing anything suspicious.
triathlon Tri timepublished at 11:52 British Summer Time 18 August 2016
Triathlon (15:00 BST)
When you say British triathlon, you think Brownlee brothers.
Alistair and Jonny take to the water, saddle and track at 15:00 BST as they look to add to the medals they won in London.
Alistair is defending champion, while Jonny took bronze four years ago.
The brothers have had their chances boosted by the withdrawal of their main threat: Spain's Javier Gomez, who is out with a broken arm. But while Gomez is missing, compatriot Mario Mola is one of several rivals who could still beat either Brownlee to gold.
Image source, Getty ImagesAt the Copa...published at 11:52 British Summer Time 18 August 2016
Money makers, record breakerspublished at 11:48
Image source, GettyRegardless of the result in their semi-final against Spain tomorrow, the United States men's basketball side have set a record as the best-paid collection of basketball talent ever collected together in one team.
Forbes estimates , externalthat the 12 members of the team have collected £195m between them over the last year, eclipsing the inflation-adjusted £185m raked in by the class of 2012.
Rather than the athletes village, the United States men's and women's basketball team are staying on board the Silver Cloud luxury cruise liner moored in Rio's harbour for the duration of the Games.
Image source, APGet involved - your favourite random momentspublished at 11:41 British Summer Time 18 August 2016
#RandomRio2016
We're on the home straight of Rio 2016. So we want to know what your favourite random moment has been?
Was it Bradley Wiggins playing up on the podium? Or one of those awful belly-flops in the diving? Let us know via #RandomRio2016, external.
Stef Davies: Bolt & DeGrasse giggling together as they saunter across the line, leaving everyone else for dust
Russell Gowers: Best moment was @MarkCavendish, external sauntering into shot and jokingly asking @chrishoy, external for his autograph - legend.
Samba time!published at 11:38 British Summer Time 18 August 2016
It looks like Heather Stanning and a few more of her Team GB medal-winning friends have been enjoying their post-competition downtime!
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End of instagram postboxing Conlan opponent 'forced to withdraw'published at 11:38 British Summer Time 18 August 2016
Boxing
Image source, RExRussian boxer Vladimir Nikitin, who won a highly controversial decision over Ireland's Michael Conlan in Tuesday's Olympic quarter-final, is reportedly set to withdraw from the competition because of injuries sustained so far at Rio 2016.
Nikitin, 26, is scheduled to take on America's Shakur Stevenson - a prodigy of Floyd Mayweather - in the semi-finals on Thursday.
Irish broadcaster RTE produced an online game, external in which you - as Conlan - land unanswered blows on Niktin, only to lose on a decision.
Amateur boxing's governing body Aiba have admitted problems with the officiating and judging at Rio.
Image source, RTEget involved Get Involvedpublished at 11:26 British Summer Time 18 August 2016
Text us on 81111
Not enough has been made of the fact that GB have won golds in more sports than any other country. If it weren't for swimming, we'd be well clear of the US at the top of the table!
Ned, in London
golf Justin's soaking it all inpublished at 11:26 British Summer Time 18 August 2016
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End of twitter postathletics Bolt to concentrate on 100m at Worldspublished at 11:14 British Summer Time 18 August 2016
Athletics
BBC Radio 5 Live
Image source, Getty ImagesUsain Bolt also told BBC Radio 5 live he will run at London 2017 - but only in the 100m.
Bolt's revelation came after he was informed Justin Gatlin had failed to make tonight's 200m final. Bolt said Gatlin was too old to double up and that's why he was only going to run the shorter distance in London next year.