I don't know much about cricket, and I did not see the ball or the decision till now, but this shows that the ball was either an off-spinner, or a straighter one (though in the video, it does look like spinning towards the leg).
Had the ball been a doosra, it should've been on the other side of the bat. You could argue that sachin could have seen from the bowler's arm that it is a doosra, ad played accordingly, that bring us to the point that the ball spun, infact spinning enough to miss his bat by a few inches.. It could've gone on to miss the stumps.
On first reading the argument here, I thought it hit him on the full, and the hawkeye assumed it was an offspinner and turned or something.
I'm not defending Sachin, nor am I against Pakistan, but just clarifying something I noticed. Had it been Harbhajan vs Younus Khan, I would have had the same view.