Postpublished at 16:52 British Summer Time 19 September 2020
Rigoberto Uran goes through the third time check 1min 30secs down on Tom Dumoulin, who is almost at the finish now.
Slovenia's Tadej Pogacar wins stage 20 and also claims yellow jersey
At 21, he becomes the youngest winner for 110 years
Compatriot Primoz Roglic let 57 second lead slip and now 59 seconds behind
Australian Richie Porte third in the overall standings
Tradition dictates leader is not attacked on Sunday's final stage to Paris
Jack Skelton
Rigoberto Uran goes through the third time check 1min 30secs down on Tom Dumoulin, who is almost at the finish now.
Primoz Roglic's lead is down to 25 seconds.
This is incredible.
How deep can Tadej Pogacar go?
Richie Porte swaps onto his road bike for the final climb.
The virtual lead for Primoz Roglic switches from 34 seconds to 25 seconds, back to 34 seconds.
High drama.
Richie Porte is up to third overall on virtual GC.
Miguel Angel Lopez is riding a poor TT so far and the Australian is going well enough.
Tom Dumoulin is fastest at the third time check - 27 seconds quicker than Wout van Aert.
He's got about seven more minutes of climbing to go.
Primoz Roglic has stabilised his virtual lead over Tadej Pogacar at 30 seconds.
Tom Dumoulin has virtually moved in front of Rigoberto Uran and Adam Yates on GC though.
Tom Dumoulin is perhaps paying for sticking on the time trial bike. He's only 30 seconds virtually ahead of Wout van Aert now, having started it 50 seconds in front.
Adam Yates has gone through the second time check 2mins 39secs down on Tom Dumoulin's mark.
That's over a minute back on Rigoberto Uran so Yates has a very tough ask to overhaul that on the final climb and hold on to seventh overall.
Primoz Roglic's virtual lead is down to 30 seconds over Tadej Pogacar.
We could be in store for one of the most dramatic finishes in Tour de France history if this carries on.
In Tour history, four riders have taken the lead on a time trial on the eve of the final stage in Paris: Cadel Evans in 2011 (from Andy Schleck), Greg Lemond in 1990 (from Claudio Chiappucci), Stephen Roche in 1987 (from Pedro Delgado) and Charly Gaul in 1958 (from Vito Favero).
Surely Tadej Pogacar couldn't do the same? Surely...
Tadej Pogacar has stolen a few more seconds on Primoz Roglic.
Roglic's virtual lead is down to 35 seconds.
Is Roglic just waiting to ramp it up on the second half though?
Wow. Tom Dumoulin is actually 50 seconds up on Wout van Aert's leading time as he hits the final climb.
The Dutchman has elected to stay on his time trial bike.
Tom Dumoulin has gone quickest at the second time check - 18 seconds than Remi Cavagna's mark.
Jumbo-Visma continue to dominate this Tour.
Tadej Pogacar has blasted past Miguel Angel Lopez, who started two minutes before him.
Richard Carapaz has coasted through the second time check 6mins 24secs down on Remi Cavagna, who was still the quickest at that stage.
The Ecuadorian's race starts now as he tries to set the fastest time up La Planche des Belles Filles to secure the polka dot jersey.
1. Wout van Aert (Bel/Jumbo Visma) 57mins 26secs
2. Remi Cavagna (Fra/Deceuninck-Quick-Step) +28secs
3. David de la Cruz (Spa/UAE Team Emirates) +1min 09secs
4. Daniel Martinez (Col/EF Pro Cycling) +1min 48secs
5. Marc Soler (Spa/Movistar) +1min 55secs
6. Soren Kragh Andersen (Den/Team Sunweb) +2mins 28secs
7. Max Schachmann (Ger/Bora-Hansgrohe) Same time
8. Alessandro de Marchi (Ita/CCC Team) +2mins 35secs
9. Thibaut Pinot (Fra/Groupama-FDJ) +2mins 38secs
10. Thomas de Gednt (Bel/Lotto Soudal) +2mins 40secs
What is there left to say about Wout van Aert other than he's the best all-round rider in the world?
Bunch sprints, climbs, time trials - it's all so easy for him.
The young Belgian goes quickest overall - beating Remi Cavagna by 28 seconds.
The new mark is 57mins 26secs.
Primoz Roglic is 13 seconds slower than Tadej Pogacar at the first time check.
He started the stage 57 seconds ahead.
Nothing too much to worry about for Roglic so far with that final climb still to come.
But how long can Pogacar keep this pace up?