Vincenzo Nibali confirmed his supremacy at the Tour de France with his fourth stage victory on Thursday.
The 29-year-old Italian won the 18th stage from Pau to the top of the Hautacam climb after 144.5km of mountainous terrain in the Pyrenees.
In doing so the Astana rider increased his overall lead to 7min 10sec ahead of Frenchman Thibaut Pinot, who was second on the stage at 1:10.
Pole Rafal Majka, the winner of two mountain stages, was third at 1:12 to secure victory in the King of the Mountains competition
Jean-Christophe Peraud made it two Frenchmen on the podium as he came home fourth at 1:15.
The 37-year-old is just 13sec behind Pinot and 2sec ahead of Alejandro Valverde, who had started the day second.
It means three riders are separated by just 15sec in the battle for second place, which should be decided on Saturday in the 54km time trial.
Although Pinot, 24, is second, he is widely regarded as the weakest of the three against the clock.
American Tejay Van Garderen came home fifth in the same time as Peraud to boost his chances of finishing in the top five overall.
He is sixth and trails 23-year-old Frenchman Romain Bardet by just over two minutes but the American is a far better timetriallist.
Yet Thursday's stage was all about Nibali's total domination as once again he gave a demonstration in the mountains
When he made his attack with 10km of climbing ahead he ate into loan leader Mikel Nieve's advantage in no time and then simply rode away, gradually and steadily increasing the gap with every kilometre.
Preview: Thursday's unforgiving 144.5km stage 18 includes the behemoths of the Tourmalet and Hautacam mountains to climb,
"Thursday will be a very hard day, especially after the last two days," said Spanish rider Alejandro Valverde the 34-year-old Movistar leader.
Meanwhile race leader Vincenzo Nibali even admitted he was riding within himself.
"My condition is very good and I'm ready to push right to the end but when I get to the end of a stage I'm not giving everything because I don't have to, and I've also had an eye on the next stage," said Nibali.
However, he admitted it would have been different had the best riders been there.
Reigning champion Chris Froome crashed out on the fifth stage with a broken hand and wrist while two-time former winner Alberto Contador broke his shinbone in a fall on the 10th stage on Bastille Day.
"If Chris Froome or Alberto were riding I would need to push much more but then I would also have to manage the race differently and play more of a waiting game," added the Astana team leader.
"When they attack they are more explosive so I would have to be careful.
"I have a lot of respect for these riders."
Here's a video preview of the stage from Global Cycling Network.