Tadej Pogacar continues to blast the start.

He's just 17 seconds down on Remi Cavagna at the first time check.

Let's see how Primoz Roglic goes in a sec...

Miguel Angel Lopez goes through the first time check - he's lost 40 seconds or so to Richie Porte.

Wow.

Wout van Aert trailed Remi Cavagna by 39 seconds at the first time check. He's just gone through the third check six seconds quicker.

And he's changed to his road bike.

The Belgian is flying up the climb now.

Another stage win?

A bit of history that might be on Tadej Pogacar's side...

Small sample size and all, but every time a Tour stage has finished at La Planches des Belles Filles since it first featured in 2012, the yellow jersey has changed hands.

In 2012, Bradley Wiggins took over the race lead (though famously Chris Froome won the stage). In 2014, Vicenzo Nibali took it, in 2017 Froome claimed it and then last year Giulio Ciccone did.

Richie Porte goes through the first time check 48 seconds slower than Remi Cavagna.

It all depends on how Miguel Angel Lopez goes but that's not great by the Australian.

Mikel Landa goes 1min 31secs down on Remi Cavagna at the first time check so he's doing worse than Rigoberto Uran and Adam Yates so far.

He's also lost 20 seconds to Enric Mas and is in danger of losing fifth overall here.

Tadej Pogacar is 12 seconds up on Primoz Roglic so far.

Still a long way to go though and Roglic will have expected his compatriot to really attack the start.

Daniel Martinez set the best time up the final climb at 17mins 20secs.

That's the mark that Richard Carapaz will be targeting.

Richard Carapaz is all-but sitting up - both Guillaume Martin and Damiano Caruso have cruised past him on the flat road.

Adam Yates goes through the first check point 1min 10secs down on Remi Cavagna's leading time.

Rigoberto Uran was only two seconds quicker than that. Yates is going well so far.

Tom Dumoulin is flying - he was just 12 seconds back on Cavagna at the same point.

Dumoulin won the 2017 world TT title.

Wout van Aert has made up six seconds back by the second time check.

The Belgian hasn't given up on this yet.

Matt Warwick
BBC Sport

One of the most interesting elements to this time trial is how Richard Carapaz on Ineos Grenadiers is riding it.

He will win the King of the Mountains polka dot jersey if he amasses enough KoM points - but those points are only awarded to the fastest up the category 1 climb up to La Planche des Belles Filles at the end.

So unlike most others who have to gun it and be in a world of pain for the whole course, Carapaz can sit up and smoke a cigar for the flat section before blasting up the hill having changed his bike.

Theoretically, Pogacar could do the same and compete for the dots himself, but he can't afford to sacrifice anything in the GC battle just in case Roglic ends up in a ditch.

Anyway, Carapaz should be nailed on for it - and it's 25,000 Euros tucked into the TT onesie for the winner.

Image source, Getty Images

Another shake-up in the top 10 of the stage standings...

Colombian TT champion Daniel Martinez, who won stage 13, has just gone third quickest, 1min 20secs back on Cavagna.

Thibaut Pinot crosses the line, cheered all the way home.

And he's finished in a provisional sixth place, 2mins 10secs down on leader Remi Cavagna.

A very admirable ride by the Frenchman. Chapeau.

Talk of the devil - it's not Julian Alaphilippe who wins most combative rider for a second year in a row.

Sunweb's Marc Hirschi does get the nod and was apparently the unanimous choice of the jury.

Certainly the right choice in my view but I did wonder whether affection for Alaphilippe would play a factor.

Hirschi won stage 12 after a couple of near misses but continued going on the attack and was a big factor in team-mate Soren Kragh Andersen's stage 14 win.

The Swiss was also in the mix for the polka dot jersey until he crashed on stage 18. A hugely impressive debut Tour by the 22-year-old.

Primoz Roglic has just under an hour of brutal effort between himself and a first Tour de France title.

Off he goes...

Tadej Pogacar needs to beat Primoz Roglic by 58 seconds today to win the 2020 Tour de France.

No one is expecting him to do it.

But does this Tour have one last twist left in it?

Miguel Angel Lopez begins, knowing a good day will see him finish on the podium.

Could he even threaten Tadej Pogacar in second?

Can Richie Porte finish on the podium of the Tour de France for the first time at the age of 35?

The Australian needs to beat Miguel Angel Lopez by 1min 29secs.

Here he goes...

Off goes Mikel Landa.