I have heard a lot of people saying that Contador may lose the Tour because he doesn't have the strongest team. I really don't think that will matter much since the Tour will be decided in the mountains and the final TT. Let's face it, he will not lose time on the cobbles and he is one of the strongest, if not the strongest climbers and time trialists.
There is no TTT this year and it's not like AC had a lot of support in the mountains last year or needed it. Lance and Andy Schleck have stronger teams but if AC uses his head and arrives in the form he showed last year, everyone will be fighting for 2nd and 3rd.
P.S. I am not an AC fan and do not want him to win but I think it will be his Tour to lose.