10 July, 2017
Froome suffered a mechanical problem on the Mont du Chat, the last of three hors categorie climbs on the day, and as the three-time Tour victor was calling for the team auto Aru attacked in a clear breach of cycling's protocol.
He beat France's Warren Barguil (Team Sunweb) after a photo finish.
The Brit won the opening stage of the race and lay second overall going into Sunday's stage, 12 seconds behind Sky team-mate Chris Froome.
Fabio Baldato of BMC and Team Sky's Dave Brailsford also spoke to Eurosport after Stage 9.
The 32-year-old Australian received extensive treatment on the road before being taken to hospital in an ambulance.
Long identified as one of the key days of this year's race, the stage through the Jura mountains, which had there Hors-Categorie climbs, was marred by a number of crashes, with Thomas and Porte the two highest profile victims.
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The meeting was the first between the two leaders since last August, in the heat of the campaign season. Pena Nieto said he hopes to continue a "flowing dialogue".
"He was conscious, it's reassuring, he is being transferred to the hospital", Pommery said.
Organisers said on their official Twitter feed that Thomas, who went down on the slippery descent from the Col de la Biche, had retired from the Tour.
Later on the slopes of the fearfully steep Mont du Chat, Martin - who was sitting in fourth place at the start of the day - and fifth-placed Porte came to grief, when the latter fell and brought down Martin.
Monday is a rest day and the fight for the overall title is set to resume next Thursday with the first big Pyrenean stage.
Froome had his rivals - including Porte - to thank as the group neutralised Aru's attack while he was changing his bike on the lung-busting ascent to the Mont du Chat.
Five riders in total crashed out of the race on Sunday while two-time former victor Alberto Contador was able to carry on quickly after coming down on an uphill section.