21 gold medal events on 'Super Saturday'
Athletics: GB's Dina Asher-Smith withdraws from women's 200m with injury
Athletics: Jamaica's Thompson-Herah breaks Olympic record to win women's 100m
Athletics: Daryll Neita finishes eighth in women's 100m final
Rugby sevens: GB women lose bronze medal match 21-12 to Fiji, New Zealand beat France for gold
Swimming: GB gold and world record in 4x100m mixed medley relay
Team GB has won four gold medals in the pool and eight in total at Tokyo 2020
Triathlon: Learmonth, Brownlee, Taylor-Brown & Yee win mixed relay gold
Jonny Brownlee's first gold in final Olympic race - third in total
Sailing: GB's Emma Wilson takes bronze in RS:X windsurfing, Tom Squires seventh in men's
Boxing: GB's Karriss Artingstall fights in featherweight semi-finals (11:24 BST)
BBC Sport's Annie Emmerson is telling us Morgan Pearson of the US ran a 62-minute half marathon last year. Rapid.
This ain't no half marathon though Morgan. Grab your inflatable and your stabilisers because there's some water and bike work to crack on with.
Alex Yee is off and running towards the water with a 21-second advantage over Morgan Pearson of the US.
Oh my word, this is all a bit edgy.
Great Britain have a lead going into injury time. Just don't drop too deep and let's have it.
Mixed relay triathlon
Non Stanford (Former GB triathlete)
This is the dream scenario. it will be interesting to see how Alex goes on the last leg. He can definitely hold this gap.
Georgia Taylor-Brown is lapping athletes. Thankfully this isn't the Grand National where one of them will just take the leader out for the fun of it.
Mixed relay triathlon
Matt Chilton
Commentator on BBC TV
"Excellent transition for Georgia Taylor-Brown and the Olympic silver medallist is on her way."
One lap of the run done. Taylor-Brown holds a 14 second lead over the US.
Here's your full day-by-day guide for Tokyo and details all Saturday has to offer.
Quiet Saturday folks?
I don't think so. There'll be 21 medals on offer across the Games, including the women's 100m.
Get your electrolytes in folks. You'll need endurance.
What day is it by the way?
Mixed relay triathlon
Matt Chilton
Commentator on BBC TV
"This has been a good ride by Taylor Knibb - and she has closed Taylor-Brown down."
Taylor-Brown starts her run and has 11 seconds over Knibb.
Mixed relay triathlon
So, shortly it will be the final athlete.
Alex Yee came second in the men's individual.
USA's Morgan Pearson was 42nd.
You know where I'm going with this...
Mixed relay triathlon
BBC Sport
Double Olympic champion Alistair Brownlee is talking to BBC Sport and was asked what mark would he give his brother's performance?
"Maybe 9 and a half out of 10 - I'd never give him 10 out of 10 but he did what he needed to do.
"Giving Georgia a gap was crucial so that she had clear water between her and the next person.
"A lot of the teams are under pressure and a lot of the favourites are behind.
"It's a great event to watch and be part of."
Mixed relay triathlon
Annie Emmerson
Former GB triathlete on BBC TV
Georgia Taylor-Brown is looking so smooth on her bike. She finds herself 22 seconds up on USA's Taylor Knibb.
Mixed relay triathlon
We're on leg three of four. Georgia Taylor-Brown has half her bike leg left before a short run. Then she will hand on to Alex Yee who will have to swim, bike and run.
But, here's the current setup. It's good.
Great Britain: 51 minutes, 21 seconds
United States: 22 seconds behind
Netherlands: 38 seconds off the lead
Germany: 38 seconds off the lead
Mixed relay triathlon
We're 48 minutes into this triathlon. Georgia Taylor-Brown is out on her bike and she has a very healthy lead.
My friends. Please all place your hands on your screen and we'll do this together. Let's summon good fortune and all say together...
BRING.
ME.
THE.
GOLD.
I mean, Jonny Brownlee just spoke to Matthew Pinsent as if he'd been for a walk to buy a morning paper.
The guy has just swam, biked and run at pace.
Top of the morning to you Jonathan, you animal.
Mixed relay triathlon
BBC One
Jonny Brownlee speaks to BBC One after completing leg two: "A short day. I'll take that. After Jess's amazing first leg it set us up. We just have to keep ourselves in the race now. We're in a good place now."
You can watch the action on BBC One or by pressing play at the top of this page.
Mixed relay triathlon
Jonny Brownlee puts in a truly wonderful display there. He tags Georgia Taylor-Brown and he should be seriously proud of that swim-bike-run combo.
Taylor-Brown into the water with around a nine second lead over the US in second and 22 seconds on the Netherlands in third. Germany threatening the medals - 23 seconds down on GB.
Mixed relay triathlon
Annie Emmerson
Former GB triathlete on BBC TV
Jonny Brownlee looking so fluid in his running now and we can see a huge gap opening up between Germany and the Netherlands.
Mixed relay triathlon
Kevin McDowell in second is rocking like a wooden horse. His head is going left and right. Jonny Brownlee has his foot on the pedal and all those behind him are feeling the heat from his exhaust.
Matt Chilton
Commentator on BBC TV
This will be the last time we will see Jonny Brownlee in an Olympic triathlon. He's made clear he plans to step up to Ironman.
Mixed relay triathlon
Annie Emmerson
Former GB triathlete on BBC TV
The athletes will only be racing individually for about 20-25 minutes individually so the heat won't be a factor today.