Board Thread:Naruto Discussions/@comment-4271790-20141016102132/@comment-25286995-20141016145323

Elveonora wrote: Kinda of an asspull that Madara needed to use Outer Path chakra chains or whatever to suck the Tailed Beasts and Sasuke did so with a single handseal and without any effort.

Sasuke has all the tailed beast under control because he casted genjutsu. I think that's the reason why he was also able to extract the bijuu's chakra. He used the genjutsu to control the tailed beast to give their chakra to him.