BAGNERES-DE-BIGORRE, France – The mighty mountains of the Pyrenees offered at least two important insights about Tour de France leader Chris Froome: He can land terrible blows to his rivals with his grinding uphill speed and can take their punches, too.
In short, if the Briton in the yellow jersey perhaps isn't unbeatable, he seems very close to it.
After nine hectic days of racing over 1,513 kilometers (940 miles), the Tour luxuriates in its first rest day on Monday.
The pause allows the contenders for victory in Paris on July 21 to lick their wounds and regroup after Froome knocked them dizzy and grabbed the race lead with a triumphant first day of climbing in the Pyrenees on Saturday.
But they'll also be ruing the opportunity they collectively wasted the very next day on Sunday to hurt Froome right back.
On what may well prove to have been one of the toughest and decisive days of this 100th Tour, Froome's rivals isolated him from his Sky teammates and forced him to ride alone – one man against many – up four consecutive climbs as jagged as sharks' teeth. But they could not make Froome crack.
"That was one of the hardest days that I've ever had on a bike," the 2012 Tour runner-up said after defending his yellow jersey.
The rival who harassed Froome most, with successive squirts of acceleration on the last climb, was Nairo Quintana.
The lesson the Colombian drew from this drama amid pine forests and peaks with stubborn patches of snow was: "That we can break down his team a little, but that he can defend himself and is very strong."
Sky's impressive climbing on Saturday was in some respects reminiscent of the way Lance Armstrong's U.S. Postal Service team would exhaust his rivals.
But the way Sky wilted on Sunday definitely was not. Doped up on hormones, blood transfusions and other performance-enhancers, Armstrong's teammates rarely looked human like this.
This Tour is the first since Armstrong was stripped last year of his seven titles for serial doping.
Seemingly drained by their monster efforts a day earlier, Froome's support riders quickly burned out.
The day started badly for Sky when Peter Kennaugh crashed. He was treated for grazes and continued. It also ended less than ideally when Vasili Kiryienka rode in too slowly and missed the time cut, depriving Froome of his services for the Tour's last 2 weeks.
"It's quite nice to see that they're human," Froome said of his teammates. "I think it's quite understandable considering the amount of work they did."
For some rivals, Sky's difficulties on Sunday reinforced suspicions that the team isn't as strong as in 2012, when Bradley Wiggins and Froome finished one and two on the podium in Paris.
Some riders were surprised that Sky wore itself out so quickly trying to control Stage 9.
"They are not unbeatable," said Jakob Fuglsang, the Dane who finished second behind stage winner Daniel Martin. "They blew themselves up one by one."