11.1km to gopublished at 15:02
No dice Quintana. Richie Porte and Wout Poels do impeccable work to haul the Colombian back. Froome is going to owe his team-mates a very large French beer.
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
11.1km to gopublished at 15:02
Quintana's moment?published at 15:01
Quintana was caught and the cheeky boy hid in the middle of the pack before launching slingshot to go again. Wouter Poels tries to keep with him.
11.9km to gopublished at 15:00
Alexandre Geniez is 3mins ahead in the lead. Effectively, Quintana would have to catch the Frenchman and leave Froome for dead within the next 12km.
Quintana goes againpublished at 14:58
Do or die Nairo. Do or die. Off he goes.
Nibali flatpublished at 14:57
Vincenzo Nibali suffers a puncture and gets a new bike. Chris Froome didn't attack, for the record...
13km to gopublished at 14:55
This is where the destination of the yellow jersey will be decided. The peloton is on the slopes of Alpe d'Huez. Can Nairo Quintana eat up 2ins 38secs in 13km of grueling climbing and catch Chris Froome?
Your cycling climbspublished at 14:54 British Summer Time 25 July 2015
#bbcycling
Alpe d'Huez looms... but what is your greatest climb? Use #bbccycling to tell us
Alpe d'Huez - what's the big deal?published at 14:50
An altitude of 1,835m. A distance of 13.8km at a whopping average incline of 8%. Add to that 21 bends (22 including hairpin 0?) on a mountain that has become the mecca for cycling spectators since it was first used on the Tour in 1952.
Want to know more? This three-minute documentary by BBC Radio 5 live will give you a taste of why Alpe d'Huez is the Wembley of cycling.
16.9km to gopublished at 14:48
The chase group behind Alexandre Geniez have bunched together now. There's nine of them in there, 2mins 20secs behind the leader. 1min 39secs further back is the yellow jersey group.
The start of the climb up Alpe d'Huez is about 3km away.
Postpublished at 14:42 British Summer Time 25 July 2015
BBC Radio 5 Live Sports ExtraBBC Radio 5 live sports extra are live with commentary on Chris Froome's decisive day. You can also listen by clicking the Live Coverage tab.
23.7km to gopublished at 14:41
Geraint Thomas looked like a man who had given all he had to give yesterday. But here he is at the front of the peloton, upping the pace as they whizz past the sparkling Verney lake near Allemont.
They are four minutes behind leader Geniez.
Your cycling climbspublished at 14:37 British Summer Time 25 July 2015
Keep your cycling climbs coming. Use #bbccycling
get involved Get Involvedpublished at 14:36 British Summer Time 25 July 2015
#bbccycling
Rule number two of getting involved: Cute dog pictures will almost definitely be published.
27.7km to gopublished at 14:34
One minute and 30 seconds behind Geniez are Lars Bak and Nicolas Edet. Three minutes further back are seven riders, including Thibaut Pinot, Pierre Rolland, Ruben Plaza and Winner Anacona.
31.4km to gopublished at 14:31
Alexandre Geniez is looking strong out in front. He's tucked in on his bike, whipping down the ascent and is 3mins 45secs in front of the yellow jersey group. The Frenchman broke away right the start remember.
Team Sky vehiclespublished at 14:27 British Summer Time 25 July 2015
I mentioned earlier that there may have been some aggression towards the Team Sky vehicles up ahead on Alpe d'Huez. This is all we know at the moment.
Froome almost matching Quintanapublished at 14:24 British Summer Time 25 July 2015
Your cycling climbspublished at 14:22 British Summer Time 25 July 2015
#bbccycling
We've just seen the GC contenders do it, but what are your biggest climbs? Use #bbccycling to show us
40.5km to gopublished at 14:18
Chris Froome has found his friends. Richie Porte and Nicolas Roche are at the front of a reformed peloton.
Thibaut Pinot, Ruben Plaza, Winner Anacona and Ryder Hesjedal have spurred forward though and they are a minute behind Geniez, with three riders floating in between.
get involved Get Involvedpublished at 14:14 British Summer Time 25 July 2015
#bbccycling
Totum: Any other SKY/ Froome fans on edge? I am on the edge of an edgy edge & the rest of his team have vanished rather sharpish today
Stuart: How good has this tour been? this is going to be one hell of a finish