Dina Asher-Smith will run in her second Final of the Olympics on Friday night after helping the GB 4x100m through their semi-final.

The Orpington ace, 20, only had three hours sleep after finishing fifth in the 200m final late on Wednesday night but was back on track to run the third leg, helping Asha Philip, Desiree Henry and Darryl Neita finish second in their hear in 41.93 seconds to progress.

The final, scheduled for 2.15am on Friday night/Saturday morning, will see them face the USA who progressed via a time-trial after successfully appealing against their disqualification for dropping the baton.

Asher-Smith said: "Qualification is qualification, a final is a completely different ball game. We work really hard and we know we are mentally strong so for us it shouldn’t be a problem but at the same time qualification means nothing, it gets you a good lane draw in the final.

"We’ve got to go into the race with our game face. It doesn’t matter who we’re facing, doesn’t matter what lane we have, doesn’t matter what kind of things fly at us during the race we still have to do the best performance and the one that we’ve worked for.”

The GB men will run in lane one of their 4x100m final some 20 minutes later after qualifying as one of the fastest losers from their semi-final this afternoon.

Adam Gemili was omitted from the line-up as he prepares for his 200m final in the early hour of Friday but is set to return for the final.

In Thursday's modern pentathlon fencing competition Gravesend star Kate French, 25, collected 17 wins and 18 defeats to claim 202 points which left her 19th ahead of the swimming on Friday afternoon (4pm BST).

She said: “I finished really strongly but it wasn’t really the result I was hoping for. It is all to play for tomorrow. I think I can make up some gains, we have got another four events to go so it is definitely not over yet.

“I was really looking forward to it. I warmed up well, the crowd were really good, it just took me too long to get going. It does mean I can go in more relaxed to the swimming, I am not going to give up and I will try and do my best tomorrow.”

Orpington ace Joe Choong, 21, lies eighth in the men' competition after 22 victories and 13 defeats for 222 points after a penalty.

He said: “I am in good stead for (swimming on) Saturday. It will definitely give me confidence because if I look at my results beforehand I have not fenced this well, as long as my planning goes well I will definitely be close to the medals."

There was no fairytale ending for Ashford sailor Sophie Ainsworth and partner Charlotte Dobson in the the medal race of the 49er FX class.

The 27-year-old went into the double-points race unable to win a medal and eventually finished 10th to slip to 8th overall after 13 races of competition.

Despite the disappointment, Dobson said: “We’ve also had some really, really good racing, where everything has gone really well. It makes me feel like we can mix it around the medals one day.

“It’s the nature of the FX fleet at the moment. It’s a new fleet and everyone is learning and some have a much better grasp on different parts of our sailing at the moment.

“Some days are really good and others don’t play to your strength and there’s a big difference between those days. Today was a bad day for us but we’ll be back on it the next time.

“The Olympics has been a magical experience from start to finish. Way more than I expected it to be. It’s been amazing to be part of such a strong GB team, such a supportive team and it’s been really nice to relish in their success. Hopefully one day that might be us.”

Ainsworth added: “It’s not the high we wanted to go out on but we had some fantastic racing throughout the week, so we can hold on to that and there are some positives to take home."