Image source, Getty Images

All going smoothly so far for Greek third seed Stefanos Tsitsipas.

In the only match currently on court at the Ariake Tennis Park because of the wet weather, Tsitsipas has taken the first set against Frances Tiafoe of the United States.

Looks like there are signs of activity on the outside courts, though. Which means Andy Murray and Joe Salisbury are not too far away from starting their men's doubles match...

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Great Britain's Mahama Cho has lost to China's Sun Hongyi in last 16 of the men’s +80kg.

The pair couldn't be separated in regulation time and Cho ended up losing after the contest went to golden points.

Just waking up? Just getting in? Or been with us all the way and want a reminder?

Either way, here is a run through today's highlights so far:

• Swimming: Britain's Tom Dean claimed a stunning gold ahead of team-mate Duncan Scott in a thrilling 200m freestyle.
• Triathlon: Britain's Georgia Taylor-Brown produced a superb run to earn a silver medal in the women's triathlon, fighting back from a bike puncture which left her well adrift of the leaders. Bermuda's Flora Duffy claimed a historic first gold medal for her nation.
• Rugby sevens: Great Britain suffered a 33-7 defeat against Olympic champions Fiji in their Pool B decider. They will face USA in the quarter-finals at 10:00 BST.
• Swimming: Kaylee McKeown of Australia powered to her first Olympic gold medal after a stunning fightback in the women's 100m backstroke.

Now if you're just tuning in to our coverage and wondered what went down in the women's triathlon, we've managed to wrap close to two hours of action into three minutes.

Without spoiling it, all I will say is that it was good start to day four for Great Britain.

Team GB

Here are some of the treasures we still have left to come your way.

Swimming: Women’s 200m individual medley with European silver medallist Abbie Wood and Alicia Wilson both going in the second semi-final (03:58 BST).

Taekwondo: Bianca Walkden competes for Britain in the +67kg category (06:30 BST), having added two more world titles since taking bronze at Rio 2016.

Equestrian: British rider Charlotte Dujardin will be looking to add to her three Olympic titles as she joins veteran Carl Hester and debutant Charlotte Fry in the team dressage (09:00 BST).

Gymnastics: One of the Olympics' biggest TV audiences will be expected for the women's team final (11:45-14:10 BST). The United States, led by Simone Biles, are the favourites but can Britain challenge for a medal?

Weightlifting: Britain’s Zoe Smith competes in the women’s 59kg category (07:50 BST) with Sarah Davies in action in the 64kg class from (11:50 BST).

Haydn Davis: TeamGB = 4 Golds, (TeamTom = 3 Golds)

Snookered: Must be the Games of the Tom

FYI, Lydia Jacoby is the first swimmer from Alaska to make a US Olympic team.

Hello, what is this. A complete turn up for the books in the women's 100m breaststroke as USA's Lydia Jacoby comes through to take the gold.

Her team-mate Lilly King had not lost a 100m breaststroke race since 2015 and was the reigning Olympic champ but she is pushed down to third with South Africa's Tatjana Schoenmaker winning the silver.

Wanting to know how Andy Murray and Joe Salisbury are getting on in the tennis? You will have to wait a touch longer.

Most of today's action at the Ariake Tennis Park - which includes the British pair in the men's doubles - has been delayed by at least an hour because of some wet weather.

Murray and Salisbury, who beat French second seeds Nicolas Mahut and Pierre-Hugues Herbert in their opener, face German pair Kevin Krawietz and Tim Puetz for a place in the quarter-finals.

However, Greek third seed Stefanos Tsitsipas is playing on the Centre Court - where there is a roof - against Frances Tiafoe of the United States. Tsitsipas leads 3-0 after breaking Tiafoe from 40-0 in the American's first service game.

Image source, Getty Images

Over at the Kokugikan Arena, Great Britain’s Pat McCormack has begun his bid for a gold medal with a unanimous points win against 21 year-old Aliaksandr Radzionau of Belarus in the welterweight category.

The boxer, whose twin Luke fights at lightweight, is the number one seed having won silver at the 2019 World Championship and gold at the Olympic qualifier in June.

It was a solid performance by McCormack and he is safely through to the quarter finals.

A pinch me moment if ever there was one.

Image source, Getty Images

Like so many of the athletes competing for Team GB, Mahama Cho has an interesting back story.

Born in the Ivory Coast, Cho arrived in London aged eight, where his father, a former African taekwondo champion, was teaching the sport, supplementing his income by working as a taxi driver.

He also is presumably quite a handy footballer after having trials with Dagenham and Redbridge when he was younger.

He finished fifth in Rio in 2016 and was the only member of the GB taekwondo team not make the podium. Bet he is keen to put that right this time around.

Would certainly help for the selfies.

Was Tom Dean signing the national anthem as he was being presented with his gold medal....?

He looks as though he is overjoyed. Beaming below his mask in fact while belting out God Save the Queen.

Absolute pleasure Tom.

Image source, Getty Images

Now time for those quotes from Duncan Scott and Tom Dean who have been talking to BBC Sport as their silver and gold medals sink in.

DS: "Just a massive credit to Tom Dean, that was unbelievable. Olympic champion - he's come along so far in the last 18 months, it's a pleasure to watch.

"It's great to be able to say he's a good mate out of the pool. It's great being able to compete against him as well.

"Obviously I'm delighted with that. For me massive credit to my coach Steve Tigg. I wouldn't be standing here without him. The journey I've been on with him since I was about eight years old has been phenomenal. I'm just buzzing for Deano to be honest."

TD: "I knew it was going to be a dog fight. I didn't know how people were going to swim it. It was just race to race.

"Thanks so much to everyone back home, my mum, my family, my girlfriend, all the boys back in Maidenhead, thank you for staying up."

Image source, @EmmaHSinger

We'll all be right round, Emma!