Hello and welcome to live coverage of stage 4 of the Tour de France - a 207.5km ride from Mondorf-les-Bains in Luxembourg to Vittel in France, via one Cat.4 climb and, probably, a bunch sprint finale.

Tour de France
Stage 4 | Flat | men | 04.07.2017
Completed
Mondorf-les-BainsVittel
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Eurosport UK
Updated 04/07/2017 at 17:22 GMT
18:22
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NEWSFLASH: Sagan DQ.
16:35
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Arnaud Demare is the new green jersey after winning stage 4 in Vittel. Good day in the office for the French national champion.
16:34
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Provisional GC has Peter Sagan up to second place, 7 seconds down on Thomas, after picking up bonus seconds for finishing runner-up. Froome is in third at 12 seconds. It remains to be seen if the result will stand.
16:28
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Peter Sagan is currently at the Dimension Data bus after that incident - he's apologising for his role in the collision and checking on the health of Mark Cavendish... We still don't know the full extent of Cavendish's injuries.
16:27
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We should add that the incident involving Thomas did occur in the final 3km and so the Welshman will not lose any time on GC. He got up and completed the stage - and so Thomas will stay in yellow. Confirmation of GC coming up.
16:27
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So, a terrible end to the stage for the British riders: Geraint Thomas, the yellow jersey, went down in that first crash - which brought down Marcel Kittel's lead-out train as well. And then Ben Swift also went when Cavendish hit the barriers and brought down Degenkolb.
16:24
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We're hearing reports that Mark Cavendish has broken his shoulder in that crash, which would rule the Dimension Data rider out of the race.
16:22
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Here's that incident involving Sagan and Cavendish, as well as Demare's victory.
16:20
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Greipel and Bouhanni completed the top five in that terribly messy and incident-packed sprint at Vittel.
16:15
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That's a first sprint victory in the Tour for Demare's FDJ team since 2006.
0km
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Replays clearly show Sagan elbowing Cavendish before the Manxman hit the barriers. Poor form from the world champion there.
0km
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Cavendish is still down. It doesn't look good. He was boxed out by Sagan and slammed hte barriers at speed, before being run over by Degenkolb, who went down heavily too.
0km
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The French national champion was the last man standing in an utterly chaotic sprint... It's a maiden Tour win for Demare ahead of Sagan and Kristoff.
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Victory for Arnaud Demare!
0.2km
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CRASH: Cavendish into the barriers! Another mini pile-up. Degenkolb down too.
0.5km
Demare, Greipel, Cavendish and Sagan are still here - and Bouhanni and Kristoff.
1km
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CRASH: Thomas is down - and many others. Big split in the peloton. Kittel won't make the split...
2km
The pace is high on this downhill sweep ahead of an all-important tight turn. Groenewegen is near the front but it's Boasson Hagen is on the front for Dimension Datsa.
3km
Degenkolb there for Trek, but some Bora riders are looking over their shoulders for their man, Sagan. No sign of Quick-Step of Kittel for now. Sunweb are in the mix, as are FDJ and Direct Energie. It's a technical approach to Vittel.
4km
On a little uphill kicker, van Keirsbulck is finally spat out the back after hitting the wall. Katusha and Cofidis are setting a fast tempo for Kristoff and Bouhanni. Lotto Soudal are readying themselves for Greipel, and Dimension Data are still on the right of the road for Cavendish.