Teunissen wins opening stage in Brussels
Winner becomes first Dutchman to claim yellow jersey since 1989
Defending champion Geraint Thomas involved in late crash but 'fine'
106th edition of the Tour de France & 100th anniversary of the Yellow Jersey
Brussels chosen to host the Grand Depart to mark 50 years since Eddy Merckx's first title
Right that's me done for today. Well what an ending that was, with Geraint Thomas and Jakob Fuglsang involved in crashes after a pretty sedate jaunt around Belgium.
And who would have thought Mike Teunissen, who works as lead-out rider for Jumbo-Visma team-mate Dylan Groenewegen, would pip Peter Sagan, on the line and to yellow.
Our report on stage one is building here.
Thanks for joining me and see you all tomorrow for the second stage.
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Mike Teunissen wins stage one
More from stage one winner Mike Teunissen speaking to ITV 4: "I felt good. It’s a strange day but I hope Dylan [Groenewegen] can still smile with me when I take this to the room.
"You can dream about the scenario that you have the possibility to win a stage. It’s pretty nice it’s happened."
Mike Teunissen becomes the first Dutch rider to wear the yellow jersey of the Tour de France since Erik Breukink in 1989.
What a day for the 26-year-old Jumbo–Visma rider.
Mike Teunissen wins stage one
Tour de France stage one winner Mike Teunissen speaking to ITV 4: "I can’t believe it. We were working months to bring Dylan a stage victory and the yellow jersey and then it disappears when he goes down in the crash with one and a half kilometres to go.
"I thought,I'm still fresh, I can try. And then everyone was dying near the end and I was catching Peter Sagan and I took him on the line."
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Hearing that Geraint Thomas is ok and was able to get back on his back after a crash in the closing stage of the first stage.
A crash or tumble at the wrong time can potentially ruin or end anyone's race but Thomas won't lose any time as the three kilometre rule will be invoked here.
I told you it was close.....
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No he hasn't. Mike Teunissen has got it by half a wheel, coming over Peter Sagan to win on stage one.
Who would have thought it. Teunissen has basically done his job leading Dylan Groenewegen out and then carried on after the crash to fly past the three-time world champion on the line.
The lead out trains are in total disarray.
Has Peter Sagan got this.......?
A huge crash in the peloton. Looks like Geraint Thomas could be down.
Dylan Groenewegen is definitely down.
Michael Matthews, Peter Sagan, Caleb Ewan and Elia Viviani are all there.
All the big hitters in the sprint.
Sunweb are right up there. Their sprinter Michael Matthews, will fancy this slightly uphill finish.
Bora-Hansgrohe are shifting now though. Peter Sagan is ready.
It's time for the sprinters' teams to go to work, and the pace at the front of the race is absolutely frenetic.
Can you attack off this pace? It's ferocious.This looks like it could be carnage.
Jakob Fuglsang dropped back to the medical car off the back of the pack a few moments ago.
The Dane appears to have knocked his knee in that crash but it looks, at least for now as if he'll be able to continue.
It looks like Stephane Rossetto's sojourn at the front is over.
The Frenchman's lead has been cut in half in the blink of an eye, as the peloton ups the tempo.
He's now well within range and about to be swallowed up, as the race moves back towards the heart of Brussels.
Dafydd Pritchard
BBC Sport in Brussels
Image source, BBC SportA sense of anticipation is building by the finish line, where the podium, commentary points and VIP areas were set up earlier.
Just a few hundred yards down the road are the team buses, as imposing and impressively kitted out as those tour buses you see carrying bands around. Less Jagermeister and more isotonic drinks, though.
Team Ineos are here but, judging by this number plate, they still have a little work to do adapting to their new title sponsors.
Stephane Rossetto is still going strong. He's got a 50 second lead.
Meanwhile Jakob Fuglsang's Tour de France could be about to go down the swanny.
He looks pretty badly shaken and is about 45 seconds off the back of the peloton. His team car pulls alongside and he removes his sunglasses to reveal a cut eyebrow, with blood trickling down his cheek.
His Astana team-mates are trying to guide him back up through the team cars and on to the back of the peloton.
Jakob Fuglsang is down. What was I saying about him staying out of trouble earlier.
The 34-year-old Dane, has blood all over his face after a crash in the peloton and he has dropped right off the back.
Astana have got some work to do to get their team leader back in the pack.