Image source, PA

Exultation at the moment of victory: Frenchman Gargaud Chanut shows his delight at winning gold in the C1 canoe slalom.

Ever wondered which Olympic athlete you are most like? Take the body match test to find out whose body is most similar to yours.

Image source, Getty Images

Ibtihaj Muhammad became the first American to compete at the Olympics in a hijab in these Games, losing to the France's Cecilia Berder in the last 16 of the sabre fencing.

"I am hopeful that this monumental moment in our history continues to encourage unity and respectful dialogue. All praises to the most high. Team USA and proud!" she wrote in a Facebook post.

Australia's Daily Telegraph lead with an opinion piece on the battlelines between athletes who have served a drugs ban and those who haven't.

Image source, Daily Telegraph

The New York Times have a similar story beneath a shot of golden girl Simone Biles.

Image source, New York Times

Colombian newspaper El Tiempo look forward to what could be a historic day for the nation with three medal shots in action.

Image source, El Tiempo

12:30 BST: Emma Pooley is in action in the women's cycling time trial.

13:00: Steve Scott starts his challenge in the men's double trap shooting.

14:00: Chris Froome and Geraint Thomas go in the men's cycling time trial.

14:22: The men's quad sculls team race in their final in the rowing.

Here's more on today's action, plus keep up to date with what's going on when and where with the BBC Sport's schedule.

• Siobhan-Marie O'Connor and the men's 4x200m freestyle relay team win silver medals for GB
• American Michael Phelps takes his Olympic gold medal tally to 21 with victory in 4x200m freestyle relay and 200m butterfly
• Defending champion Serena Williams, of the US, is out of the Olympics after losing to Ukrainian Elina Svitolina in the third round
• Britain's Andy Murray and Johanna Konta progress in their respective men's and women's tennis singles competition

Watch all this and more in the Olympics Playlist.

Renowned for his outspoken personality, broadcaster Piers Morgan caused quite a debate by suggesting that anything other than a gold medal at an Olympic Games is a failure.

But not all agreed with his suggestion as retired 10km openwater Olympic bronze and two times world silver medallist Cassandra Patten highlights...

Morgan's professional career is a series, external of unqualifiedsuccesses of course.

Let us know your thoughts, is anything other than gold a failure at an Olympic Games?  

Image source, BBC Sport

Team GB are ahead of where they were after four days at London 2012, with six medals compared to four at the same stage four years ago.

Since the modern Olympic era began in 1896, no host country has increased its medal tally at the next summer Games.  

For more medal statistics, head this way.

The full medal table is here.

Siobhan-Marie O'Connor was diagnosed with ulcerative colitis in 2013 - a condition that can leave her feeling run down and susceptible to illness. 

The 20-year-old and her dad struggled to hold back the tears after her silver medal in the women's 200m individual medley.

"If she could stay fit and well I was hoping she'd get a silver medal and she showed it. But I didn't expect the time," Siobhan's father, Sean O'Connor, told BBC One.

"She has a condition but she never moans and has had a good block of work this year and you can see what she's capable of when she's fit and well.

"Siobhan coming away with a medal, I don't think it'll get any better for me."

Image source, Reuters

Born and raised in Somerset, O'Connor made her mark on the international stage aged 15 in 2011, winning 200m individual medley gold at the ASA National Championships.

She missed her school prom to attend the the 2012 British National Championships, where she won 100m breaststroke gold and booked her place as the youngest swimmer on the London 2012 Olympic team.

She failed to make it through her heat, but gained the experience of swimming in the medley relay final in front of 17,500 people.

O'Connor went on to win six medals at the 2014 Commonwealth Games, including 200 medley gold, before taking bronze in the same event a year later at the World Championships.

In July this year, she displayed her all-round ability by breaking the British 100m breaststroke record.

Siobhan-Marie O'Connor was just 0.3 seconds behind Hungarian world champion Katinka Hosszu, who set an Olympic record, in claiming a silver medal for team GB in the 200m individual medley.

"It feels pretty unreal. I'm trying not to cry," said the 20-year-old afterwards. "It's the best feeling in the world.

"When I looked up and saw the times and the position, I was like, what? It didn't seem real. 

"Walking round (after the medal presentation) and seeing my family, I was getting choked up. It means everything.

"It's been tough but it's so, so worth it."

Image source, Getty Images

Canadian diver Meghan Benfeito suggested the colour change may actually help the divers as it makes it easier to differentiate between water and sky as they go through their flips on the way down.

"It's not the same colour as the sky so that was really on our side today," said Benfeito, who won bronze with Roseline Filion in the 10m synchro last night.

"The fact that it was green actually helped. The only thing we said is, 'Don't open your mouth in the water'. Just in case."

Image source, Getty

The change in the pool's colour caught Olympic officials off-guard and scrambling around for an explanation.

Pedro Adrega, head of communications at Fina, swimming's governing body, was flabbergasted, suggesting athletes had perhaps requested for the colour change to lessen the effects of the sun's glare.

Inside the press room, American photographers chatted about the possibility that the water had not been treated properly overnight, causing a drop in chlorine levels and the formation of algae.

Arguably the biggest talking point on Tuesday was the colour of the diving pool.

Divers were baffled. Organisers were speechless. And social media couldn't get their head around it...

Image source, AP

Michael Phelps is the most decorated Olympian of all time and has won more than twice as many gold medals at the Games as the athlete second on the list, former Soviet gymnast Larisa Latynina (nine). 

If he was to take all 21 of his Olympic gold medals to the smelters to form just one gong - for convenience perhaps - the resulting mega-gold weight in at around 10kg.

Each medal contains a minimum of six grams of gold meaning that he could extract £4230 worth of the precious metal from his haul at current prices.

I don't think he will be resorting to that any time soon.

Michael Phelps gives his brilliantly named baby Boomer a kiss as he celebrates his gold in the men's 200m butterfly...

Image source, AP

There was a star-spangled feel to the action in the pool last night as well.

Record-breaking Michael Phelps extended his tally to 21 Olympic gold medals as he won individual and team titles on day four at Rio 2016.

The American, 31, comprehensively beat defending champion Chad le Clos in the 200m butterfly before he helped the US win the men's 4x200m freestyle relay.

"That's a lot of medals," said Phelps. "It's just insane. It's mind-blowing."

The fab fivepublished at 08:41 British Summer Time 10 August 2016

08:41 BST 10 August 2016

The fab five have won so many fans around the world that you can now take a quiz to find out which team member you are., external