American Bobby Finke is being reeled in by Italy's Gregorio Paltrinieri with a third of this race gone - the lead is now 1.27 seconds.

Finke was travelling at world record pace but he's fallen off that now.

Team Ireland's Daniel Wiffen remains third.

Bobby Finke is setting the pace after 300m of this mammoth race.

Finke is 1.83 seconds clear of Italy's Gregorio Paltrinieri with Team Ireland's Daniel Wiffen in third.

BBC One

You can tune into this evening's swimming session, the final one of this Olympics, on BBC One right now...

On to the next one and Daniel Wiffen, who represents Team Ireland, is looking for his second medal of the Games.

Wiffen won gold in the 800m freestyle.

He's got some stiff competition here with America's Bobby Finke among them.

Karen Pickering
Swimming & diving expert on BBC Radio 5 Live

That is the title that Sarah Sjoestroem didn't have. The 50m Olympic freestyle is the one that she did not have in the glittering career she has had, and now she's got it.

Matthew Henry
BBC Sport in Paris

I told you earlier in the week how excited my Swedish neighbours got when Sarah Sjoestroem won the 100m title.

They're far more reserved today. I think they were expecting that one.

Image source, Getty Images

Sweden's Sarah Sjoestroem already has a gold in the 100m freestyle safely packed away in her suitcase but she may have a little room left for another.

Sjoestroem won silver in the 50m freestyle at Tokyo 2020 but boasts the world record for this event - 23.61 seconds - and has a target on her back in this final.

So, who could challenge?

China's Zhang Yufei has collected four medals so far in Paris - winning one silver and three bronze, while America's Gretchen Walsh has a gold and two silvers.

Australian pair Shayna Jack and Meg Harris have also picked up medals in Paris.

Jack played a part in the 4x200m freestyle relay and they were both involved in Australia's success in the 4x100m freestyle relay.

The French support, as ever, will be wild tonight.

This group of British fans have come to make themselves heard, however.

"We might not be quicker on Marchand's leg but we can beat them in the rest," one tells me.

Andy Gray
BBC Sport NI at La Defense Arena

Image source, BBC Sport

Daniel Wiffen already has one Olympic gold medal to his name, and is favourite to add another this evening in the 1500m freestyle.

I bumped into his family on my way into the La Defense Arena, and it's fair to say they are pretty relaxed about Wiffen delivering a historic second gold medal.

I should also point out that's his twin brother, Nathan, and Daniel didn't just go for a leisurely stroll pre-race - not that it's stopped fans stopping Nathan and asking for photos.

Wiffen can become the first athlete from Northern Ireland to win two Olympic gold medals, and the first man to represent Team Ireland to win multiple golds in a single Games since 1996.

Matthew Henry
BBC Sport in Paris

A whiteboard outside La Defense Arena has had a handwritten evening schedule on each night here.

Tonight, on the final night at the pool in these Olympics, it is headlined 'The Last Dance for King Leon I'.

France's new national hero, Leon Marchand, will line up in the 4x100m medley relay, attempting to win a fifth gold of these Games.

Can he do it? Well France qualified fastest but USA, China and even Team GB should have something to say.

We're just 10 minutes away from some swimming action.

Settle down, you don't want to miss this - it's the last night in the pool.

Here's what's coming up...

17:30: Women's 50m freestyle final

17:37: Men's 1,500m freestyle final

18:10: Men's 4x100m medley relay

18:32: Women's 4x100m medley relay

Victoria Pendleton
Olympic cycling gold medalist on BBC Radio 5 Live

Hats off to Kristen Faulkner for choosing the perfect moment and making that attack.

I thought the chasing pack were going to catch her but they just didn't get themselves organised.

Chris Boardman
Olympic cycling champion on BBC TV

The Brits were just slightly underpowered but they did everything they could in that race.

They shaped it.

Katie Falkingham
BBC Sport in Paris

Kristen Faulkner showed zero emotion as she crossed the line in front of me. Did she realise how much of a gap she had?

By my calculations, she's the United States' first winner of the Olympic women's road race in 40 years.

Image source, BBC Sport

A photo finish for the silver medal! Marianne Vos throws her bike forward and just about takes it.

Lotte Kopecky is third and Blanka Vas fourth. A few seconds down and Team GB's Pfeiffer Georgi crosses the line in fifth.

Chris Boardman
Olympic cycling champion on BBC TV

Faulkner doesn't believe it. I thought there was a ghost of a smile, but I think she was just in shock.

Chris Boardman
Olympic cycling champion on BBC TV

Kristen Faulkner looks so settled.

You wouldn't think she has a kilometre to go.

She hasn't even looked round.

Under one km to go. Only a puncture can stop Faulkner now.