John Cullen
Former Taekwondo international

Watch the hands - it's so important to block these kicks.

Double scores on the board for Walkden

A huge kick to the trunk edges Bianca Walkden further ahead to 14-7.

And there's another from the Team GB fighter, who counters an attempted spinning kick.

It's 16-7 with one minute remaining. Walkden in control.

Bianca Walkden moves three points clear at 7-4 but Kazakh fighter Cansel Deniz pulls level by the halfway stage of round two

This is quite the battle.

From there, Walkden moves away with a couple of great kicks and it's 12-7 with one round to go in this quarter-final.

Jonathan Overend
BBC Radio 5 Live commentator

Everyone is so good aren't they in this competition!

Staggering quality!

Cansel Deniz catches Bianca Walkden in the face and there's a timeout before the action can resume.

Walkden responds by landing a legitimate kick to the head to take charge in this fight.

The 29-year-old leads 6-4 after the first round.

Cansel Deniz lands a punch and then finds the trunk to move 3-0 ahead against Team GB's Bianca Walkden, but a gam-jeom gets Walkden on the board halfway through the first round.

It's time for three-time world champion Bianca Walkden to begin her bid for Olympic gold in Tokyo.

Kazakh Cansel Deniz stands in her way of a place in the semi-finals.

Let's do this.

Oli Stone: What an amazing morning, couldn't stop shouting and screaming. Well done Tom and Duncan, great race, a truly deserved performance.

Can Bianca Walkden add to another morning of success? She gets underway very shortly.

Anyone else feeling a bit like Oskar yet?

Image source, Ben Rodenby

Simon Gleave, head of sports analysis, Nielsen Gracenote:

"Tom Dean and Duncan Scott produced the first 1-2 for Great Britain in an Olympic swimming race since 1908 when this was achieved in the men's 200m breaststroke and men's 1500m freestyle. Prior to today, Great Britain had never won a medal in the men's 200m freestyle."

If you missed it in the early hours of this morning, Tom Dean claimed a stunning gold and Duncan Scott took silver to ensure a British one-two in the men's 200m freestyle.

And not only did they both medal, they've made history too...

Caz Cockburn: Just catching up with womens triathlon - gees, I will never moan about cycling to work in the rain again. Massive shout out to Team GB Triathletes and congrats on the silver

Can three-time world champion Bianca Walkden claim the Olympic gold that has so far eluded her in Tokyo?

After receiving a bye to this stage, the Rio 2016 bronze medallist takes on Kazakh Cansel Deniz in the quarter-finals this morning.

She's won two world titles since taking bronze in Rio five years ago, and also won European gold in April.

That's at 06:30 BST.

Hello everybody, how are we today?

Have you been following the action through the night? Or are you just tuning in for another day of Olympic drama?

Feeling tired yet after all these late nights, early mornings and alarms that you've been setting for halfway through the night?

Whatever your situation, I want to hear how you've been managing to keep across the action - and how you're holding up on day four!

Get in touch via #bbcolympics.

BBC One

You can watch Olympic Breakfast with Dan Walker and Sam Quek over on BBC One now.

What are you waiting for!

And get your coffees made quick. Rio 2016 bronze medallist Bianca Walkden will be on in around 25 minutes.

Team GB

Here's a quick reminder of what is on its way a little later:

• Taekwondo: Bianca Walkden competes for Britain in the +67kg category (06:30 BST), having claimed 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 get in the mix for a medal?
• Rugby Sevens: Great Britain face the USA in the men's sevens quarter-finals (10:00 BST).
• 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).

One of the faces of the Tokyo Games is OUT!

Naomi Osaka, the Japanese second seed who had the honour of lighting the Olympic cauldron, loses 6-1 6-4 to Czech world number 42 Marketa Vondrousova in the third round.

Simon Mason
Ex-GB Olympic hockey player on BBC TV

Germany got the rebound off Ollie Payne's foot, to give a hat-trick to Fuchs.

GB have been outplayed here today in Tokyo with individual and team mistakes.

Penalty corner Germany and Florian Fuchs is on hand to claim his hat-trick.

Great Britain have been completely overwhelmed in this men's Pool B fixture, which thankfully comes to an end.

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.
• Taekwondo: Great Britain's Mahama Cho lost to China's Sun Hongyi in the last 16 of the men’s +80kg.
• Badminton: Britain's Toby Penty beat Kai Schaefer of Germany 21-18 21-11 in his Group K men's singles match.
• Tennis: Greek third seed Stefanos Tsitsipas beat Frances Tiafoe of the United States in the men's singles. British pair Andy Murray and Joe Salisbury have seen their men's doubles match delayed by rain.