Paula Radcliffe
Women's marathon world record holder on BBC TV

The athletes want to get out there and perform. There is a Mo legacy now. We saw Andy Butchart up in fourth and if you had said four years ago that we would have a British guy in fourth place with Mo still winning it, you would not have thought it possible, but it is because he has seen Mo winning it, he has seen how hard he has worked and said that is what I need to do.

If you want to watch the sensational end to Farah's 5,000m race, here it is in all its glory.

The double double...

Bianca Walkden's conqueror China's Zheng Shuyin goes on to win gold, beating Maria Espinoza of Mexico.

Paul Chelimo was disqualified after the end of the 5,000m race - which meant a bronze for Bernard Lagat.

However, Lagat is not sure:

"I didn't know. I gave all I had. I finished and was still smiling to everybody, saying 'good job'. I wanted to go to the warm up area and cool down, and see my kids. It is hard to imagine. If you finished fourth and somebody stepped on the line once and got no advantage and you finish fourth, do you really want to say 'gosh, I won the bronze medal because a guy cheated'.

"To me, I feel like 'yes, things happen'. I guess if the rules are like that, whatever decision they want to make tonight I'm going to accept it. Then again if they tell me they gave it me by accident and take it back, no problem."

Image source, PA

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

It has been a dramatic transformation with GB since 2002. I think the real turning point was Charles van Commenee to be honest. He took a tougher approach and that was needed. What I saw before was being OK with mediocrity and now you see athletes coming off the track saying they want more.

It's the final gold medal on the track of Rio 2016 and it went to the US 4x400m relay team.

Christine Ohuruogu after winning her third Olympic medal tells BBC One: "It has been hard but I really want to start enjoying the last 10 years or so of my sport. It is nice to go home with a medal. 

"We have really worked hard because we thought we could medal here. We had to come together as a team today, we had to stick in, stay focused and keep each other's spirits up. I am so proud of them, we got a good job done today." 

Image source, Reuters

Image source, Getty Images

Eilidh Doyle: "We went out and did the same plan we had for the last four years. I wanted to give the girls the best possible start and thankfully I did and they took it on from there."

Anyika Onuora: "I just about hung on. I tried to keep my composure the best I could and I am ecstatic to be here with these girls and to be an Olympic medallist. Can you believe? Me, an Olympic medallist!"

Emily Diamond: "It has been the most amazing experience. We came out here and knew a bronze would be up for grabs and I am so proud we did it."

Confident words from British athlete Andrew Butchart after he finished fourth in the 5,000m when asked if he doubted that Mo Farah would take gold:

"No. I have seen him training. Some of the stuff he does, nobody can do it. End of. He's such a relaxed guy, you feed off it. It makes you more relaxed. He's having fun all the time. He's got one more year then it's my time."  

Image source, Reuters

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

This US team I knew would come under threat. It is not a strong team and has not been for sometime. They relied heavily on Merritt but it was great to watch.  A great anchor leg from Jamaica's Francis, he chased down Botswana. A great competition to end the athletics with.

Image source, AFP

If the GB men's team had been in that final, and ran the same time as they did in their heat, they would have finished fifth. 

Long jump, high jump, javelin, shot-put, discus, hammer throwing, sprinting, long distance - get into athletics and find a discipline that is right for you.

Image source, Getty Images

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Andrew Cotter
BBC athletics commentator

That was a great race. The USA did win but not in the manner we expected, we expected them to be much further clear. I felt sorry for Botswana, not getting it quite done in the final leg but they did top load and that is the risk.

Belgium missed out on bronze by three hundredths of a second to the Bahamas. The brothers and Julien Watrin did set a national record though. 

Not only did Allyson Felix clinch a record sixth career Olympic gold, but the United States won the 4x400m relay for a sixth straight Games. 

They have not lost a 4x400m relay since finishing in silver behind the unified team of former Soviet Union states at the 1992 Barcelona Games. 

Image source, Reuters

Spain's Ruth Beitia takes gold with a jump of 1.97m

Phenomenally at the age of 37.

It is also her first Olympic medal. Never give up...

Stand up and take a bow Team GB - the British 4x400m relay teams bronze betters the 2012 medal haul as GB move on to 66 so far.

Sit back and watch history happen...