Chapeau, Alberto!
I don't blame Katusha or Astana or whoever for attacking after AC flatted. It's the only way anyone is gonna beat Alberto F. Contador. If it was me, and I wanted to win, I'd attack him when he flats, when he crashes, when he calls for a nature break - anything, because those chances are few and they are what anyone can hope for. Alberto has had bad luck. He probably has had the worst luck of anyone within 30 minutes of him (I am making this up, but it smells about right) and he is still 4:00 ahead of the nearest pretenders.
The goal is the double. I hope Alberto rides defensively, limits his losses to the pretenders (as if), treats the last week like a quality training bloc, kicks the *** out of everyone at Le Tour, and then goes on to win the MF Triple. He doesn't need a stage win - he didn't get one in 2008 either, but everyone knows who crushed the *** out of the field on Mt Etna, even if it was stricken because clinic.