Fascinating day of racing on what the commentators think is the the hardest stage. It had a bit of everything, including losing the TV coverage for about 10 minutes of key action due to a major rainstorm.
Racing continued to be waaay different to the usual TdF patterns.
The big contenders let a big group of riders away up the road - more than 3 minutes - including some of their key teammates (e.g. Fuglsang, Kuss and 2 others from TJV, and Soler) and even someone like Kelderman, who is something of a GC threat.
Coming onto the big final climb, Lopez attacked really early and broke away. George gave Roglic a little bit of help to chase, but was struggling and quickly slid out the back.
A smallish group continued to chase Lopez, with Quintana and Valverde also taking it in turns to attack Roglic - who they clearly wanted to break with the ITT pending. Meanwhile some of the key men from the breakaway in front sat up and waited for their leaders - most worryingly, at the time, Fuglsang waiting for Lopez - and those two powered on. Sepp Kuss dropped back and provided some key support for Roglic.
Around this time the TV pictures disappeared and the rain poured down. 
While that was occurring, Valverde, Quintana and Pogacar broke away from Roglic. Lopez somehow managed to crash on a graveled section. Edit: Turns out Roglic also crashed on the gravel section - a motorbike somehow got in his way.
When the TV reappeared, Lopez was riding with most of the remnants of the breakaway. V,Q and P were rapidly closing on him and Roglic was 20 or 30 seconds further back. Marc Soler had broken away and was heading towards winning the stage.
Quintana and Pogacar rode past Lopez and made a break on the others. Roglic came surging back and caught and passed Lopez and eventually Valverde.
Much to his disgust, Soler got reined in to wait for, and help, Quintana - allowing the Stage win to fall into Pogacar's lap.
Net result is that Quintana gets the red jersey, 6 seconds ahead of Roglic with Valverde and Lopez both within 30 seconds and Pogacar 1.42 back. Pogacar is a guy who is going to be a major force with Bernal in coming years - I watched him thwart George on the climb up Mt. Baldy in the Tour of California earlier this year.
George battled on, but is now 7 minutes behind in 15th place (though probably 10th in terms of genuine contenders). That's surely enough rope that he'll get a chance to escape up the road and hunt a stage win.
Meanwhile, it's a rest day then attention turns to Patrick Bevin and whether he can win the Individual Time Trial, in which he'll be a major contender.