Michael Johnson
Four-time Olympic gold medallist athlete on BBC TV

Speaking about USA's winning 4x400m relay team:

When Allyson Felix is your weak leg, it shows the standard of competition!

I didn't think they were going to be able to threaten the world record because Allyson would be tired.

But that was a great performance by them!

I was surprised not to see the Jamaicans up in there but Poland - as we predicted - were there.

How about this for a story? Neeraj Chopra has won India's first Olympic athletics gold medal with a throw of 87.58m in the men's javelin.

Historic! Imagine the scenes across the country.

Ahh he's done everything right!

Brazilian Richarlison has already missed from the penalty spot and he's just smashed another effort against the crossbar.

He did all the hard work - timing his run, remaining onside, wrong-footing the defender, but he hit it straight at Unai Simon from close range and it's tipped onto the crossbar.

Excellent save. Richarlison can't catch a break!

Denise Lewis
Olympic heptathlon gold medallist on BBC TV

They're still developing, we've got new names coming into the quartet all the time.

It was very brave by them so I don't think they should be disappointed.

Hands on hips and shoulders slumped for the British quartet. They ran a seasonal best of three minutes 22.59 seconds but it was not enough to earn a place on the podium.

United States' victory in the 4x400m women's relay means Allyson Felix has won an 11th Olympic medal. ELEVEN!

That means she has moved past Carl Lewis as the nation's most decorated track and field athlete.

Here was that goal from Matheus Cunha in the first half.

Back under way for the second half. Brazil lead through Matheus Cunha.

Bryan Gil and Carlos Soler are on for Spain. Marco Asensio and skipper Mikel Merino are off.

The United States already seem to have this wrapped up. Poland leading the best of the rest, Britain battling hard for bronze...

Steve Cram
Athletics commentator on BBC TV

Jodie Williams was put on the second leg to give GB a boost, and she hands over in fifth.

Sydney McLoughlin starts like a train for the States, casually looking at the screen as she eases towards the line.

Ama Pipi makes a strong start for GB, crossing the line in second after starting out in the outside lane.

The good old U-S-of-A are the red hot favourites for gold. But GB could medal. Here we go...

2 Netherlands

3 Canada

4 Poland

5 Jamaica

6 Cuba

7 United States

8 Belgium

9 Great Britain

Michael Johnson looks full of life today. Maybe that's because he knows the United States are the heavy favourites in the 4x400m relay. Or maybe it's because he's finally got his hands on some fruit this morning.

Paula Radcliffe
Women's marathon world record holder on BBC TV

It was a much more mature performance today from Jakob Ingebrigtsen and that was needed for the final.

Jakob isn't just the stand-out name in Norway, the Ingebrigtsen name is like the Kardashians - they are huge!

But there's no 'Keeping up with the Ingebrigtsens!'

Coming up on the track in the Olympic Stadium is the women's 4x400m relay.

Britain's quartet of Ama Pipi, Jodie Williams, Emily Diamond and Nicole Yeargin will be in lane nine.

Less 10 minutes until the gun goes off.

Brazil lead at the break thanks to that goal from Matheus Cunha and despite Richarlison missing a penalty earlier in the half.

The 2016 champions are contesting the gold-medal match for a third straight Games, having lost to Mexico at Wembley in 2012 before finally ending their Olympic ‘curse’ on home soil at the iconic Maracana five years ago.

Spain, a squad packed full of Euro 2020 stars, were many people's favourites coming into the tournament so they have work to do.

An Olympic final goalscorer would fit in nicely at Elland Road...

(If you know, you know.)

Brazil have finally broken the deadlock! It's sloppy from Spain.

Claudinho curls it in deep from the left, it's kicked up into the air at the back post by Dani Alves who is stretching to keep it in play, and Pau Torres fails to get his head on it.

In comes Matheus Cunha, who takes one touch then absolutely smashes it into the back of the net, right on the stroke of half time.