Elaine Thompson-Herah won the sprint double-double at the Olympic Games after storming to victory in Tuesday's 200 metres final.

The Jamaican won in a new national record time of 21.53 seconds in Tokyo, the second-fastest in the history of the event.

Thompson-Herah, the 100m champion, also claimed gold over both distances in Rio de Janeiro five years ago. Usain Bolt is the only other male or female sprinter in history to win both titles at consecutive Games.

Christine Mbomba, barred from her preferred 400m event due to naturally high testosterone levels, took silver with another world-best under-20 time of 21.81. United States star Gabrielle Thomas won bronze ahead of Jamaican great Shelly-Ann Fraser-Pryce.

Unsurprisingly, Thompson-Herah admitted her exploits had left her in need of a rest, having followed her 100m gold with a 200m run just 0.19 seconds short of Florence Griffith-Joyner's 1988 world record.

"Honestly, I just need to sleep!" she said to the BBC.

"I have not slept since the 100 metres, honestly my body is in shock mode, but I still had my composure to come out here.

"I knew my time wouldn't be fast because yesterday we ran two rounds, which took a lot from me, I equalled my PB last night. So to come out to get a national record and be two-time Olympic champion I am so happy.

"I was begging for the line, but you have to hold your technique through the line.

Thompson-Herah added: "It feels good to be in the history book, to set a barrier for the other generation of athletes coming up.

"We have got a lot of athletes coming from Jamaica, it means a lot to me to set this barrier."