no order

This I thought was a great battle between Teacher and Student and honestly on of my favorite fights in this anime.

Yoruichi Vs. Soi Fon (Bleach)

The Ultimate Battle between Taicho and former Pupil. They are both incredible Shinigami with unheard of power, there speed is amazing and so is there looks ;).
This fight is great its evenly matched until The secret technique SHUNKO! us released. So please go and watch this fight between teacher and student.

watch video here.