It appears that Contador fell on his own, getting something out of his pocket on a straight. Broke his bike. Teammate Nicholas Roche gave him his bike, then waited for the team car.
'We were so confident in Alberto, we didn't have a Plan B. Then Plan A went out the window' - Independent.ie
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"...during the Lance years, being fit became the No. 1 thing. Totally the only thing. It’s a big part of what we do, but fitness is not the only thing. There’s skills, there’s tactics … there’s all kinds of stuff..." Tim Johnson