67.7km to gopublished at 13:29
I take back what I said about those riders getting swallowed up. Rafal Majka, Ruben Plaza and Winner Anacona have had a second burst and are 30 seconds ahead of the peloton and 5mins 30secs behind the breakaway.
Summary
Britain's Chris Froome all-but wins overall race
Froome leads Quintana by 72 seconds with one stage remaining
Stage 21 largely processional into Paris
France's Thibaut Pinot wins stage 20
67.7km to gopublished at 13:29
Survive the stagepublished at 13:26 British Summer Time 25 July 2015
Those sprinters dropping off will be doing some maths while in the seat. There will be a cut-off point to finish the stage and not be eliminated from the Tour.
71.3km to gopublished at 13:24
Those riders who went for a maraud off the peloton are about to get swallowed back up again. The breakaway group of four have lost more time and are 6mins 18secs ahead.
There are a few sprinters dropping off the back now, including Mark Cavendish and Andre Greipel.
#polkadreamspublished at 13:20 British Summer Time 25 July 2015
Bardet is dreaming of the spots.
Polka dot jerseypublished at 13:18
As we await the emergence of the summit of Col de la Croix de Fer, here are the king of the mountains standings. There are 50 points up for grabs on today's two climbs. Can Romain Bardet cling on to the spots?
Image source, Le Tour73.7km to gopublished at 13:16
Alexandre Geniez, Lars Bak, Nicolas Edet and Ramunas Navardauskas are getting pulled back, their lead of nearly 8mins is down to 7mins 14secs.
Your cycling climbspublished at 13:12 British Summer Time 25 July 2015
#bbccycling
Hope you don't get fleeced up there (there's sheep in the picture and they have fleeces, you see).
Anyway, send us your photos of your cycling climbs using #bbccycling
75.5km to gopublished at 13:10
Ruben Plaza and Warren Barguil are also among seven riders attempting to bridge the gap to the front four. Winner Anacona is also moving for Movistar, maybe to give Quintana a man up the road.
Team Sky are unmoved.
76.3km to gopublished at 13:07
Alexandre Geniez, Lars Bak, Nicolas Edet and Ramunas Navardauskas are now 7mins 51secs ahead in their breakaway group. There are a few moves off the front of the peloton, including Tinkoff's Rafal Majka. Team Sky will not worry until Nairo Quintana's Movistar start getting animated.
Your cycling climbspublished at 13:04 British Summer Time 25 July 2015
These spotted guys have made it to the top. Send us pictures of your cycling climbs by using #bbccycling
Team Sky suffering?published at 13:01
Image source, APNairo Quintana and his Movistar team may have been handed the tiniest semblance of hope yesterday that this Team Sky squad is not invincible.
After 19 leg-sapping stages, the up-til-now indefatigable Richie Porte, Nicolas Roche and Geraint Thomas were finally cast aside. But Chris Froome was still able to rely on Wouter Poels until the final few km up to the line at La Toussuire.
Can Movistar pick off Team Sky again and isolate Froome? It will be their only hope.
80km to gopublished at 12:59
The peloton zips around a roundabout in Pierrepin-Dessous that has a statue in the shape of a knife in the middle. But who will have the cutting edge today?
Stay tuned for similar hilarious gags throughout the afternoon.
80.9km to gopublished at 12:57
The peloton is on Col de la Croix de Fer. Does Nairo Quintana want to win the yellow jersey? The next 29km up to the top will give us the answer.
The crowds are growing here, plenty of noise and colour on the roadside. It's lovely to see.
get involved Get Involvedpublished at 12:54 British Summer Time 25 July 2015
#bbcycling
Rule number one of getting involved - if you say nice things we will use your photo.
Phwoar!published at 12:53 British Summer Time 25 July 2015
British Olympic gold medallist Dani King is a very, very lucky lady.
82.7km to gopublished at 12:51
That gap keeps growing and growing. Alexandre Geniez, Lars Bak, Nicolas Edet and Ramunas Navardauskas are 6mins 45secs ahead as we hit the lowest point of today's route. That means, as Yazz might gleefully shout into your earholes, the only way is up, baby.
Your cycling climbspublished at 12:47 British Summer Time 25 July 2015
#bbccycling
What's your greatest climb? Whether it's to the mountain top or a toddle up a hill, send us the picture you tookby using #bbccycling
87km to gopublished at 12:44
The sky is blue and glorious. The peloton is wide and broad. The pace is slow and steady. Team Sky briefly had a go at the front, and shared a chuckle between them. Five minutes up the road are the four breakaway riders. They're switching positions like a top pursuit team in a bid to keep the gap growing.
Postpublished at 12:41 British Summer Time 25 July 2015
BBC Radio 5 Live Sports ExtraPlenty of British support for Chris Froome on Alpe d'Huez. But our BBC Radio 5 live team have also spotted a Colombian contingent rooting for Nairo Quintana.
There is commentary on BBC Radio 5 live sports extra from 14:30 BST.
92.6km to gopublished at 12:37
The Alexandre Geniez lead group must have dinner plans - they are three minutes up the road. We've got about 10km before the ascent up Col de la Croix de Fer begins. It's here where we will find out if Nairo Quintana is really going to put a serious challenge on Chris Froome.