Board Thread:Naruto Discussions/@comment-12509038-20140830021423/@comment-24593592-20140927165156

The blindspot is very tiny, remember?

Rachin123 wrote: One of many for plot things but it to give part it probably all happened it quick susession and she probably thought Sakura was nothing and ended up be punched. And its just normal chakra no elemental so she wouldn't negate it and she'd need the truth seeking ball to negate it anyway. Again I'm sure this happened in quick susession.

Her body can negate ninjutsu too. It been noted that it doesn't work on Obito even if they got the balls away from him and the Rasengan is normal chakra but Naruto needed to add Senjutsu to it to do damage. So yeah, it was a plot hole.