Postpublished at 14:13 British Summer Time 25 July 2015
BBC Radio 5 Live Sports Extra
Rob Hayles will be live on BBC Radio 5 live sports extra and online from 14:30 BST.
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
Postpublished at 14:13 British Summer Time 25 July 2015
48.3km to gopublished at 14:12
We can probably take a small breather as Quintana, Froome, Valverde and Nibali set into a rhythm. The big question is this: Has Quintana taken enough out of Froome to hit him for 2mins 38secs on Alpe d'Huez and clinch the yellow jersey? Stay tuned, this should be good.
Alexandre Geniez leads by 2mins 28secs
49.1km to gopublished at 14:08
Froome uses the descent to slot in behind Quintana and he's right behind the Colombian. Nibali and Valverde are a few seconds further back - they have a chat and pick up the pace. Will the peloton regroup?
51.2km to gopublished at 14:07
That Nibali move has sparked Froome into life, the yellow jersey man is pumping the legs and drops his team-mate Porte. Quintana is over the summit. But Froome is closing.
52.6km to gopublished at 14:05
Valverde is looking like he is struggling to keep pace with Quintana - the Colombian needs his team-mate for the descent. And Vincenzo Nibali is attacking Froome...
53.7km to gopublished at 14:04
Meanwhile Alexandre Geniez is still out on his own heading to the summit of Col de la Croix de Fer and he gets there first to collect 25 points. Quintana and Valverde ar 2mins 38secs further back.
Image source, Getty Images54.8km to gopublished at 14:02
This is excellent from Movistar. We have a real race on for the yellow jersey. They have made 10 seconds on Chris Froome. It's nowhere near enough but it is a start.
55.3km to gopublished at 14:01
Geraint Thomas and Nicolas Roche drop off the back. Chris Froome has just Richie Porte with him. Quintana is up with Valverde and they are a good few seconds ahead.
55.7km to gopublished at 14:00
The gap is growing and Quintana is in behind Serpa - the pair are countrymen. If Quintana can get up to Valverde he can tuck in behind his team-mate on the descent. Can Team Sky react?
Quintana goespublished at 13:59
It's happening. Nairo Quintana has moved...
Image source, Getty Images56.5km to gopublished at 13:58
Jose Serpa of Lampre is the next man to fire off the front of the peloton. It's a name you won't have heard much - he's 139th in the GC, so nothing to worry about for Froome.
Valverde is 30secs ahead of the group and is 3mins behind leader Geniez.
57.2km to gopublished at 13:55
Chris Froome has Richie Porte and Nicolas Roche with him, and the Team Sky pair go to the front in a defensive move. It seems they are happy to let Valverde go - the third-placed Spaniard is 5mins 25secs behind Froome in the GC.
57.9km to gopublished at 13:53
It's Nairo Quintana's team-mate Alejandro Valverde who makes the first big move. He's gone up the road and is pulling away. Quintana stays.
58.3km to gopublished at 13:51
Alexandre Geniez has moved ahead of the breakaway and is looking to go solo. But the GC contenders are pedaling a bit harder in the peloton and Nairo Quintana looks like he might be putting himself in a position to move.
The little Colombianpublished at 13:49
Chris Froome was taking nothing for granted yesterday, reminding reporters that there was a 'little Colombian' still standing between him and victory.
Since his nine-mile journeys cycling to school in Colombia, Nairo Quintana has been a man content on a bike. He has become renowned for explosive moves on the mountains, which could prove useful today - will he go for it now?
59.5km to gopublished at 13:48
Team Sky are tucked in just behind AG2R La Mondiale and the peloton is closing on the breakaway - 3mins 44secs now. But Peraud's spent and drops back.
Image source, EPA60.8km to gopublished at 13:43
Jean-Christophe Peraud, who suffered horrendous road rash earlier in the Tour, is increasing the pace of the peloton. He's a team-mate of Romain Bardet and the plan is to get the polka dot wearer to the top of Col de la Croix de Fer first for 25 king of the mountain points.
Your cycling climbspublished at 13:41 British Summer Time 25 July 2015
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62.5km to gopublished at 13:40
Ruben Plaza, Winner Anacona and Rafal Majka did not last long - they've been hauled back into the peloton, which is now 4mins 41secs off the breakaway.It's still a long slog up this first climb and there's still time for Nairo Quintana to go for glory.
Trouble at Dutch corner?published at 13:34
ITV4 are reporting that spectators reacted aggressively to the Team Sky vehicles when they passed through Dutch corner just now.
Dutch corner is on bend seven on Alpe d'Huez, and it's famed for being a bit of a party zone.
Image source, Getty Images