Of the GC contenders...
Voeckler:
We can forget about him for the overall, he'll crack on either the Col d'Izoard or on the Galibier tomorrow, there won't be any mid-stage truces like we've had on the last two days to give him an easy ride to the finish.
Evans:
He's probably in the best position, being a better tester than the Schecks he knows that he can afford to lose a little time to Frank, and Andy has to claw back 1'18" before he's even level. He's got 2 minutes on Contador, so again, he can afford to do just enough to limit losses on the stages.
Frank Schleck:
Needs to put 1-2 minutes on Evans to have a buffer zone for Saturday, though 3 minutes might be preferable.
Andy Schleck:
Needs to beat Evans by 2 minutes per stage to have a buffer on Saturday. Too much to ask?
Samuel Sanchez:
He'll be joined at the hip to Contador through the Alps. Not sure what his time-trialling is like, a good bet for the podium, maybe not the overall,
Alberto Contador:
Just under 2 minutes behind Evans, I reckon he'll want a minute or two on the Aussie. The question is whether he waits for the final climb tomorrow before lighting the blue paper, or will he try to go early? Alberto attacks!
Damiano Cunego and Ivan Basso aren't that far behind Contador, but despite them being in the final selection a few times, I'm not sure that either can do enough to get the overall.