Elaine Thompson wins in 21.78, Dafne Schippers takes silver in 21.88, Tori Bowie bronze in 22.15.

Cracking run from GB's Dina Asher-Smith, fifth. 

Here we go. Let's go fast eh?

21.34 - that's the world record set by Flo-Jo. SAFE AS HOUSES. 

Denise Lewis
Olympic heptathlon gold medallist on BBC TV

It is a big, big night for Dafne and Holland. They will have stayed up to watch this because she is the poster girl and they believe she has a realistic chance of a title here. She is ready and I really do think she will be tough to beat.

Dafne Schippers is the fastest this year - with a season's best of 21.93 seconds.

Will the winner go faster than that tonight?

Alistair Magowan
BBC Sport in Rio

Image source, BBC Sport

The empty seats inside the stadium are probably explained by the large queues outside, with people deciding to arrive midway through the bronze medal match, saving themselves for the main event ahead which starts at midnight, local time. 

Having been to a couple of beach volleyball matches already, the atmosphere resembles an outdoor nightclub and Brazilians know how to get behind their team. And it takes a serous amount of energy. 

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

Schippers is the class of the field and Dina is going to have to run that personal best that she got last year of 22:07 to even get close.

There are a lot of Dutch fans in Rio tonight. A special night for Dutch, for European sprinting?

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

Dafne Schippers has been very consistent this year. She has not run as fast as she did last year but this is what she has been targeting, no doubt about that. It is going to be a tough race, very tight. 

Dafne will probably not be leading at the beginning but she can do the Usain Bolt type of thing towards the end. He really starts to come through and she can do that over 200m.

Can Dafne Schippers win the 200m? Or will be a sprint double for Jamaican Elaine Thompson?

GB runner Dina Asher-Smith is in. 

Take a look at GB's Talbot achieving a personal best to finish third in his semi-final. Unfortunately, he didn't make it through to the final as a fastest loser.

Usain Bolt had a great start to help him win the second heat of the 200m semi-finals. Here's the heat which saw Bolt even slow down near the end as he was that far ahead.

Brittney Reese has improved her final jump to 7.15m - but it's two centimetres shy of US team-mate Tianna Bartoletta...

Usain Bolt has just reacted to Justin Gatlin not making it to the 200m final...

"No, seriously? Everybody is in shock, I don't know.

"You can tell from the 100m that he's getting old..."

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

Gatlin made a bit of a mistake. He relaxed. He didn't realise the others were upon him and then he tried to get back into it but you can't do that with the class of this field. 

That was a huge mistake and he will know it. A very strange race.

Yohan Blake had so much time off and is not able to run under 20 seconds and probably ran far too fast for the type of shape and condition he is in. He hasn't had the training yet that can sustain that type of speed.

Tom Fordyce
Chief sports writer in Rio

So both Gatlin and Blake out. And Brittney Reese, red-hot favourite for long jump gold, looking like she will have to settle for silver too. A night of shocks in this sticky stadium.

Darren Campbell
Former British sprinter on BBC Radio 5 live

Well, well ,well, who would have thought that?

But you know what, at the age of 34 the hands of time pass over you and the strength and performances that you had pass over you.

I think we’ve seen the start of that today.