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

We have seen it where Usain Bolt has been a little more serious. I was wondering how his approach would be to this, he wasn't too thrilled with that 100m time so maybe he has taken a different approach to this one.

Danny Talbot: "Just like last year going to Beijing I ran a PB. Hopefully it will be enough to get into the final, but we will have to see. To be honest I think I had a really good start but then almost relaxed too much round the bend. I was too cautious and maybe should have gone harder. Every athlete thinks they have more in the locker, hopefully that is true for me."

It's his favourite event. Usain Bolt out for his 200m semi. Also in this race are Canada's 100m bronze medallist Andre de Grasse, and GB's Adam Gemili.

Gemili will have that 20.25 of Danny Talbot's in his sights. 

Danny Talbot will certainly have no regrets there. A PB in an Olympic semi-final. Spot on.

Darren Campbell
Former British sprinter on BBC Radio 5 live

Danny Talbot had a fantastic start and was probably just slightly ahead of LaShawn Merritt as they came off the bend, but Merritt used that 400m and Lemaitre was really travelling.

But all you can do is perform at your best, Danny came third, he’s in the fastest qualifier position, people can get tight and tense, this is the Olympic Games.

Steve Cram
BBC athletics commentator on BBC TV

Woooah, Christophe, where did you get that from? Really, really good from the Frenchman. A big run.

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

Danny Talbot is in that third position, a great run from him. He did what was necessary. He challenged Christophe, worked hard around the turn and was not intimidated by anyone.   

Favourite Brittney Reese is having a nightmare out there. That's three fouls out of four jumps.

Great bend from Danny Talbot but then he is left behind on the home straight, LaShawn Merritt comes through to win in 19.94.

Christophe Lemaitre powers through to take second in 20.01 and Talbot is third in a new PB! He clocks 20.25. That could be enough...

Danny Talbot in the blocks. Expect LaShawn Merritt to win this one though. Go!

A time of 20.37 was enough to scrape into the final in 2012. Danny Talbot has ran 20.27 this year.

Tom Fordyce
Chief sports writer in Rio

Atmosphere building through the 200m semi-finals. Usain Bolt in the second of the three, off at 0208 BST.

The athletes are on track for the first semi-final.

Britain's Danny Talbot is in this one alongside 400m bronze medallist LaShawn Merritt. 

Super cool. Jamaican team-mates Usain Bolt and Yohan Blake are as relaxed as it gets in the warm-up area. Just leaning back against the wall, chatting. 

It's approaching 10pm in Rio and it's fair to say not too many have faniced a wander down to the Copacabana for a bit of beach volleyball. There are some empty seats as the bronze-medal match between Brazil and the USA gets under way.

Image source, Reuters

Lorraine Ugen has been eliminated from the women's long jump final, but Jazmin Sawyers is eighth so gets the extra three jumps.

Can she improve?

Image source, EPA

The biggest names. The biggest Games.

Usain Bolt goes in the second semi-final tonight (02:08 BST) as he chases an eighth Olympic gold in his eighth event, while Justin Gatlin (SF3, 02:16 BST) will again be on his tail.

The fastest man in the world this year though? 400m bronze medallist LaShawn Merritt. He has clocked 19.74secs.

Fast - until you remember that Bolt's world record is 19.19...

Ashton Eaton - America's reigning Olympic and world champion - took some stick on Twitter, external for wearing a Canada hat in support of his partner Brianne when she competed in the heptathlon the other night.

Winning the decathlon gold for the States will shut up those 'patriotic' keyboard warriors. He's a class apart in the fourth and final 400m heat, winning by a country mile.

Eaton leads the overall standings at the end of day one on 4621 points, ahead of Germany's Kai Kazmirek (4500) and Canada's Damian Warner (4489).

Image source, EPA

Favourite Brittney Reese has fouled again. She is only fifth at the halfway point. Needs a big improvement. 

Tianna Bartoletta is into the lead! She has jumped out to 6.95m as Jazmin Sawyers hits 6.57m with her third jump. No improvement.

Sawyers is seventh.