Great Britain's Katarina Johnson-Thompson sprung a huge upset to claim a stunning heptathlon gold medal at the World Athletics Championships.

The 26-year-old took the crown with 6,981 points - beating Jessica Ennis-Hill's previous British record - to seal her fifth senior title.

Nafi Thiam, who holds the Olympic title, was odds-on favourite to defend her 2017 victory before the start of competition, but finished second on 6,677 points, with Austria's Verena Preiner third.

Belgium's Thiam has been untouchable for the last three years, winning world, European and Olympic titles. She had not lost since Gotzis in 2016.

But Johnson-Thompson sent out a major warning to Thiam ahead of next year's Olympics in Tokyo and won Great Britain's second gold in Qatar after Dina Asher-Smith's 200m victory on Wednesday.

Bahrain's Salwa Eid Naser destroyed the field and stunned Olympic champion Shanuae Miller-Uibo as she became the first Asian to win the women's 400m world title.

The Nigerian-born Eid Naser, 21, surged past Miller-Uibo on the back straight to win in 48.14 seconds, the third fastest time in history, while Miller-Uibo took silver in 48.37.

Eid Naser seemed to be in a state of shock as she sat on the track and covered her mouth with her hand at the end of the race.

Bahamian Miller-Uibo managed to close the gap down the back straight but left it too late to catch her rival.

Jamaica's Shericka Jackson took bronze.

World record holder and defending champion Kevin Mayer of France pulled out of the decathlon injured, with Germany's Niklas Kaul surviving a gruelling final day to triumph with a total haul of 8,691 points.

Estonia's Maicel Uibo secured silver, with Damian Warner bagging bronze.