Britain's Hamish Turnbull and Jack Carlin both kept their hopes of a medal alive in the men's sprint competition, but only just.

Turnbull defeated Mikhail Yakovlev of Israel by 0.001 seconds, with Carlin finishing 0.004 seconds clear of Nicholas Paul of Trinidad and Tobago to move into the quarter-finals.

Dame Jessica Ennis-Hill
London 2012 Olympic heptathlon champion on BBC TV

Matt was just running his own race, he ran it perfectly and Quincy Hall almost came out of no where. And he finished so unbelievably strong.

It shows how cruel sport can really be, to be caught right at the line there.

Matthew Hudson-Smith took the lead around the top bend.

Image source, Reuters

He held firm down the straight and was leading all the way...

Image source, Getty Images

...until he wasn't.

Image source, Getty Images

BBC One

Stick with BBC One for the big one, the men's 3,000m steeplechase.

Well maybe not the big one, but it is often action packed with brutally high jumps and a water hazard.

Should be fun!

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

Image source, Reuters

Matt Hudson-Smith came into the bend exactly where he needed to be and at that point you thought there would not be any challengers. I thought Quincy Hall was really too far back even though he is a finisher.

The issue here for Matt is that he started to slow down dramatically [on the straight] - he is now really tired. The contrast is Quincy Hall has so much left from what he did not do on the curve.

Matthew Henry
BBC Sport in Paris

It promises to be another lively night under the roof at Roland Garros at tonight’s boxing.

France have hope of gold later, Taiwanese Lin Yu-ting fights again while the Uzbekistan supporters are already making themselves heard in support of Bakhodir Jalolov who has his semi-final later.

BBC iPlayer

You can watch boxing now on iPlayer or by clicking the Watch & Listen link at the top of this page.

There is applause and celebratory handshakes galore for Matthew Hudson-Smith. The GB sprinter has a smile on his face, but he was consoled with a long hug from his team straight after the final.

Ding! Ding! The crowd cheer around the Stade de France as new 400m champion Quincy Hall rings the big bell.

Christine Ohuruogu
Former 400m Olympic gold medallist on BBC Radio 5 Live

Matthew Hudson-Smith did nothing wrong, Quincy Hall ran beautifully. He came like a steam train.

Silver medal, European record, brilliant time. These are not slow times.

I know Hudson-Smith will feel disappointed but I hope he will take heart from the fact that he worked it right to the line, he gave it everything he could.

It was a good race, it's just how it ended up today. What a result to go home with.

Colin Jackson
Two-time world 110m hurdles champion on BBC TV

Image source, PA Media

Matt will feel a little bit disappointed because he lost the gold medal.

But he has run so,so well throughout this whole season.

We wish he had got the title but he has done himself proud.

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

Quincy Hall is such a finisher. He did the exact same thing at the US Olympic championships.

Look at the face, look at the strength. He is a closer. He is raw, not the best technique at the end of the race. But he does what he does.

Made the decision to switch from 400m hurdles to 400m flat last year and it has paid off.

It's disappointment for Great Britain's Matthew Hudson-Smith, but the times in that men's 400m final were rapid!

Quincy Hall (USA) - 43.40 (personal best)

Matt Hudson-Smith (GB) - 43.44 (European record)

Muzala Samukonga (Zam) - 43.74 (National record)

Katharine Merry
Olympic 400m bronze medallist on BBC Radio 5 Live

Image source, Reuters

Matthew Hudson-Smith looks up at the screen and shouts with frustration but immediately goes over to Quincy Hall to say well done.

A European record by Hudson-Smith. In the dying few metres of that Olympic final, Hall pulled back Wolverhampton's finest and took the 20th gold medal for the USA in this event.

What a run from Hudson-Smith, he threw it all out there. He really did. Hold your head up high, you're an Olympic silver medallist.

Colin Jackson
Two-time world 110m hurdles champion on BBC TV

Image source, Getty Images

We feel for Matt Hudson-Smith. It seemed like he did everything just right.

He was 100 per cent in the lead until 399 metres but all respect to Qunicy Hall. He never gave up. Just at the crucial moment he found the extra gear, that bit of charge.

Image source, Getty Images

Matthew Hudson-Smith had the lead coming into the home straight but it just wasn't meant to be for the GB athlete!

He takes home the silver medal, with American Quincy Hall ringing the winner's bell after surging through on Hudson-Smith in the final moments.

Muzala Samukonga of Zambia celebrates taking the bronze medal.

Dame Denise Lewis
Sydney 2000 Olympic heptathlon gold medallist on BBC TV

I don't think we will see Matt Hudson-Smith run any differently to what he has done already. He just needs to have the confidence to hit that top bend and hold his form heading into the closing stages. Kirani James really did look excellent.

Matthew Hudson-Smith is doing his preparations in lane six.

The 29-year-old could make history tonight as the first British athlete to win the men's 400m since Scottish athlete Eric Liddell's gold medal at the Paris Olympics 100 years ago.

Go! Go! Go!

Steve Cram is a fountain of knowledge.

Who was the director of Chariots of Fire, the commentator asks?

Hugh Hudson is the answer.

It's meant to be (we hope) for Matthew Hudson-Smith.

Dame Denise Lewis
Sydney 2000 Olympic heptathlon gold medallist on BBC TV

Matthew Hudson-Smith is very hungry. His move to America from Birchfield was so key to humbling him a little bit, because he was a little cocky kid.

He has plied his trade over there, he has been protected and nurtured by his coach and the team. They have given him the confidence, tools and ability to be on this stage.