World Athletics Championships: British sprinter Adam Gemili qualifies for 200m final

Adam Gemili: produced fastest 200m by a Briton for 19 years

The 19-year-old's effort puts him second on the British all-time list behind John Regis and was enough to win the third of the semi-finals and book his place in Saturday's final.

Gemili has now taken 0.32s off his personal best in 10 hours, having gone into the championships with a best of 20.30s and lowered it to 20.17s in the heats on Friday morning.

He said: "I can't believe it. Honestly that is the best feeling in the world. Twenty seconds, to break that, I'm over the moon.

"I didn't realise it was me. I was looking across when I crossed the line and I didn't know if I had qualified.

"I made the final and I have run a PB and I am so grateful to so many people who I have to thank, but I still have to stay focused for the final tomorrow.

"Whatever happens now, I've put myself in amongst the best 200m guys in the world. I can't ask for more than that. It's crazy, I'm speechless."

Defending champion Usain Bolt also made it through, jogging down the straight to win his semi-final in 20.12s, while Curtis Mitchell of the United States won the first of the semi-finals in a personal best of 19.97s.

Gemili's team-mates James Ellington and Delano Williams were both eliminated.

Second gold for Fraser-Pryce

Jamaica's Shelly-Ann Fraser-Pryce completed the women's sprint double with victory in the 200 metres in 22.17 seconds.

Murielle Ahoure of Ivory Coast added her second silver of the championships, having also finished as runner up to Fraser-Pryce in Monday's 100m final.

Nigeria's Blessing Okagbare took bronze in the same time - 22.32s - as Ahoure.

Allyson Felix, the Olympic champion and three-time former world champion over 200m, failed to finish after suffering a leg injury early in the race.

There was disappointment for Britain's men in the 4x400m relay final, finishing in fourth place.

United States, anchored by individual 400m champion LaShawn Merritt, took gold in two mins 58.71s, ahead of Jamaica in second and Russia third.

The British women's 4x400m squad was shorn of the injured Perri Shakes-Drayton because of a knee injury, but in her absence the quartet of Eilidh Child, Shana Cox, Margaret Adeoye and Christine Ohuruogu did the business in their heat, winning it in three mins 25.09s.

Russia's Tatyana Lysenko won gold in the women's hammer with a championship record throw of 78.80 metres, while Germany's David Storl retained his men's shot put world title with a season's best of 21.73m.

Storl's winning effort was originally ruled a foul but was allowed to stand after judges consulted a photographer's camera.

Chris O'Hare ensured there will be British representation in the 1,500 metres final by finishing fourth in his semi-final in three minutes 43.58 seconds.

Tiffany Porter looked good in cruising into the semi-finals of the 100m hurdles, but Marilyn Okoro and Laura Muir both went out in the semi-finals of the 800m.