My trick is to get Sakura down health so she just is scared of getting near you then get on the water while charging your chakra, since Sakura usually throws kunai then just jump over and continue(note:do NOT use special jutsu)
Oblivion will destroy you. Oblivion will destroy all. Let him take your soul, or fear the wrath of his might! These are the words he speaks, "Welcome.....TO OBLIVION!!!!"