Zenoorin, ranked world number 40, trailed 3-0 before she managed to land a head kick in the dying seconds of the third round to level the scores at 3-3, sending the bout into a golden point.

The Iranian was able to hold her nerve in the sudden-death period, despite the gulf in the pair's world rankings, registering a score to take a shock victory and condemn Jones to a disappointing defeat.

The contest was evenly matched until Jones, Britain’s first-ever Olympic taekwondo champion following victory on home soil at London 2012, took the lead and kept her opponent at bay for large periods thanks to her stout defence.

Zenoorin continued to launch attack after attack, however, and she restored parity with a late strike before claiming an unexpected win to ensure she topped the podium.

"Never given a gold medal away so stupidly in my life .. Truly disappointed in myself .. But thanks so much to every1 (sic) who always supports me," Jones tweeted.

The bronze medals in the category went to Hedaya Malak of Egypt and Croatia's Martina Zubcic.

In the other final to take place today, Hun Kim of South Korea also needed the golden point stage to take victory as he beat compatriot Lee Dae-hoon in a topsy-turvy final.

The world number 16 raced into a 7-1 advantage but his team-mate clawed his way back into the match-up, reducing the deficit to 8-7 in the second round.

By the end of the third, the two taekwondo players were locked at 12-12, meaning a golden-point round was necessary to separate the Koreans.

Both athletes were landing shots that many of the crowd inside the arena thought were scoring ones but it was Kim who managed the final blow to claim gold at the expense of the world number three.

Russia's Maksim Khramtcov clinched the bronze medal, with the other going to Iran's Abolfazl Yaghoubi Jouybar.

The results on the final day saw South Korea seal an overall double as they topped the medal tally in both men and women’s categories.

Their men took home a total of four medals, including  one gold, while the women claimed two golds.

The next WTF Grand Prix is dueto take place in Samsun, Turkey from September 18 to 20.


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