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Tokyo Olympics - Men's 100m final LIVE: Build-up, race and reaction

Italy's Lamont Marcell Jacobs claimed a surprise win in the men's 100 metres final at the Olympics as Great Britain's Zharnel Hughes was disqualified for a huge false start.

Born in El Paso, Texas, Jacobs came home in a time of 9.8 seconds, edging out Fred Kerley of the United States by 0.04secs.

Canada's Andre De Grasse collected a second successive bronze in the event, having also finished third at Rio 2016.

A devastated Hughes told BBC after the race: 'My left calf cramped up on me. I felt if I was in the final I would have won a medal - no doubt about it.

'Unfortunately my calf cramped - I can't describe it.'

More to follow... 

More to come shortly, but what a night in the 100m

Thanks for following all - full report to come shortly...

That is a first ever Italian 100m gold medal

It may not be a British medal, but it is a first for Europe in 29 years. Italy a bit greedy though - first the Euros now this! What a summer for them!

Lamont Marcell Jacobs takes the gold medal for Italy

Fred Kerley took silver for USA, with Andre de Grasse grabbing bronze for Canada - with all three setting personal bests.

DISASTER! Hughes has made a false start

And sadly, that means he is now OUT of the final. Christie did the same things at the Atalanta Games in 1996 as defending champion.

Then there were seven...

The start will be underway shortly...

Here is how they will line up, as the stadium decends into darkness and just the 100m track is lit in a light show. Tension very much building for the Olympics' blue ribband event. Can Hughes make history?

We will be underway in a few seconds...

The athletes are out at the stadium...

The reasons it is such an open final? The Olympic champion in Usain Bolt has retired, the fastest man in the world this year Marvin Bromell missed out in the semi-final after losing in Hughes' section and the world champion Christian Coleman is also out.

It's been 29 years since Britian last tasted gold in this event...

Linford Christie took gold for Britain at Barcelona in 1992, with a time of 9.96. That probably won't be enough today, but it is set to be a really open contest in Tokyo

It's the most open 100m men's final in years

And it could end with a British gold medal. Good afternoon all and welcome to our live coverage as Zharnel Hughes attemtps to snatch what would be a stunning gold medal in the men's 100m final.

Zharnel Hughes of Team GB will be competing in the men's 100m final

Team GB will be chasing their first 100m gold medal since the Barcelona Games of 1992 when Zharnel Hughes lines up in lane four ahead of the final.

Hughes reached the final after impressively winning his semi-final, defeating this year's fastest man in Trayvon Bromell in the process.

With the field missing Bromell, the retired Olympic champion in Usain Bolt and the world champion in Christian Coleman, it is set to be the most open men's 100m final in a generation.

Follow Sportsmail's DAN RIPLEY for live coverage of the men's 100m final at the Tokyo Olympics, including build-up, the race itself and reaction.  

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