Porte finished second to stage winner and new race leader Chris Froome (Team Sky) at Vaujany, with Contador fading to fifth at 21 seconds. Froome now leads Porte by seven seconds, with Contador in third a further 20 seconds in arrears.
“To be honest it was better than expected. It was a hard day and fast and today showed I’m in good place,” Porte said of his second place.
“That I could go with Froome like that is a good sign for me.”
Froome had looked in difficultly on the lower slopes of the climb and was spotted near the back of the peloton while Tinkoff set the pace for Contador.
When an attack featuring Contador, Porte and Dan Martin went clear, though, it was Froome who closed the gap.
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