A hugely reduced field is being strung along by the might of Quick-Step.

Kittel and Groenewegen are still in contention under the flamme rouge though.

Quick-Step are hammering it on the front for Fernando Gaviria. He's the favourite for the stage now.

Mark Cavendish won't be winning the yellow jersey today. Not sure what happened but the Briton is off the back.

Bora are laying it down on the front for Peter Sagan, Lotto Soudal for Andre Greipel in behind.

From nowhere, this stage is proving a nightmare for various GC riders.

First Froome, now Nairo Quintana needs a new wheel.

The Froome group zip past him. The Colombian could lose serious time unless he gets going quickly.

Chris Froome has been catapulted over a banner at the side of the race after touching the back wheel of the rider in front.

The Briton went down on his right shoulder but has got back on and has Team Sky team-mates around him.

Rob Hayles
Ex-GB cyclist on BBC Radio 5 live, in France

Bernal is one of the few riders who could have been a plan B or plan C for Team Sky. He's also key to helping Chris Froome and Geraint Thomas in the mountains.

Quick-Step are on the front for Fernando Gaviria, who has the power of Niki Terpstra and Philippe Gilbert dragging the peloton along for him.

Lotto Soudal are up there for Andre Greipel.

Egan Bernal was the Team Sky rider who went down.

Only two BMC riders are in the front group, meaning Richie Porte has five team-mates desperately trying to pace him back.

Meanwhile Yoann Offredo is named the most attacking rider of the day.

Here are the names to look for in terms of the stage win - Mark Cavendish, Marcel Kittel, Andre Greipel, Fernando Gaviria, Dylan Groenewegen, Alexander Kristoff and Peter Sagan.

But plenty more carnage to come in this run in. Impossible to call.

This is getting frantic, with sprinters' teams jostling for position with teams trying to keep their GC riders safe.

Chris Froome and Geraint Thomas are safely in the bunch.

A pinch in the road sees a Team Sky rider touch wheels and fall off to the side.

Can't make out yet who went down but was a Team Sky jersey.

Rob Hayles
Ex-GB cyclist on BBC Radio 5 live, in France

It's pretty much game over for Demare. It's not just getting to the back of the peloton. You've got to get up to the front.

A reduced bunch is now streaming on to the finish with just 10km to go.

Arnaud Demare is out of contention for the stage win, but could Richie Porte's GC hopes have taken a huge blow on day one?

The BMC rider could lose critical time here if he can't chase back on.

An FDJ rider in the middle of the pack has gone down, causing a snarl up as riders behind crash or are caught up trying to get past.

Richie Porte and Arnaud Demare were caught up in it.

Cousin and Offredo now have just 10 seconds on the peloton.

Meanwhile, Lawson Craddock is distanced again, though he should be able to roll through to the end in time now.

For the superstitious among you - Craddock is wearing number 13.

Rob Hayles
Ex-GB cyclist on BBC Radio 5 live, in France

I understand why the organisers have put it in there to try and mix it up a bit and give any riders in the break an added bonus. But the seconds won't count for much. Anything you could gain in going for those few seconds could be lost and more later in the race.

Cousin jumps round Offredo and surges over the line to take the three bonus seconds on offer.

Two go to Offredo and Naesen does stay clear to take the final one.

Not a good day for Offredo, beaten to the line twice now having missed out on the king of the mountains points to Kevin Ledanois.

Remarkably, Lawson Craddock has dug in and managed to get back to the rear wheels of the peloton.

AG2R's Oliver Naesen has popped off the front of the peloton, perhaps thinking of that one second bonus on offer at the sprint point, should Jerome Cousin and Yoann Offredo stay clear.