And there he goes.

Chris Froome sits on Romain Bardet's wheel for a few metres and then says goodbye.

The Briton is distancing Bardet and Uran, who have to work together to bring the yellow jersey back.

Here goes Bardet!

3km to the summit, the French hope has to go.

Chris Froome covers and Rigoberto Uran latches himself onto Froome's wheel.

The top three underlining their dominance.

Dan Martin desperately trying to react behind.

Simon Brotherton
Radio 5 live at the Tour de France

Now Mikel Landa goes off the front. Chris Froome is now looking at his rivals saying, 'It's up to you'.

Louis Meintjes wants the white jersey off Simon Yates' back as the South Africa goes.

Yates responds and closes it down.

Atapuma is still out front alone but now has just 30 seconds to Barguil.

Landa is just 20 seconds behind Barguil.

Landa, jersey fully unzipped, has quickly eked out a sizeable gap to the yellow jersey.

Martin duly responds, putting Aru into more trouble.

Landa has just gone past Lutsenko, who's effort was duly in vain today.

Simon Brotherton
Radio 5 live at the Tour de France

Oh my goodness me, he does not look happy. He could lose a lot of time if he is not careful. He's hanging on by his fingernails is the champion of Italy.

Mikel Landa goes! Remember, he's a factor on GC in fifth.

Chris Froome is more than happy to let him go - others now have to work as Landa is threatening their podium places.

Kwiatkowski has totally blown. The Pole has actually stopped by the side of the road.

Tremendous effort from him in service of Froome today.

Atapuma approaches 4km to go - his advantage to Barguil is now under a minute, with the yellow jersey group about 25 seconds further adrift.

Here goes Dan Martin!

Team Sky just ride tempo back up to him, though.

Martin may be trying to just get rid of Aru - and he does! The Italian is off the back again.

Barguil has 30 seconds on the yellow jersey group.

Simon Brotherton
Radio 5 live at the Tour de France

Kwiatkowski again doing a brilliant job at the front for Chris Froome.

Warren Barguil - safe in the knowledge the polka dot jersey is his - is absolutely flying.

He's left Contador behind.

Someone from the yellow jersey group could well win the stage - they're now just 1'45'' behind Atapuma, who's not looking great now.

Fabio Aru is struggling but just about makes it back to the Froome group.

Kwiatkowski has hit the front and dropped the pace just enough for Nieve to get back on for Team Sky.

Froome's rivals will have to go again.

Uran is looking strong but no attack from the Colombian yet.

Barguil and Contador are rapidly swallowing up the riders out front.

Contador now has team-mate Mollema for help.

Can the Spaniard claim a famous stage victory?

The Colombian goes straight past Lutsenko after catching him at the front of the race.

Atapuma has just under 6km to go.

Simon Brotherton
Radio 5 live at the Tour de France

Going right back to the early 1920s this climb has featured in the Tour but never before has it had a summit finish.

Image source, Reuters

Warren Barguil and Alberto Contador sense the chance of a stage win and leap out of the elite group.

Dan Martin has got back on but Fabio Aru is really struggling.

Simon Yates is just marking white jersey rival Louis Meintjes.

Here comes the carnage!

All of a sudden Mikel Nieve slips back for Sky. Fabio Aru follows, as does Dan Martin.

Chris Froome still has Michal Kwiatkowski and Mikel Landa with him.