Board Thread:Versus Debates/@comment-25122992-20170204131429/@comment-9782468-20170227164221

Without the Sharingan, Sasuke was beating Haku in speed outside of the ice. With a 1 tomoe and 2 tomoe Sharingan, he could dodge Haku enough to avoid kill shots.

Tobirama has been dealing with 3 tomoe Sharingan for much of his life, and killed one who was on par with Madara.

Really, what Tobirama could do is kill Haku, then fight Zabuza. We all saw what happened when Haku died in Part 1. Even an exhausted Kakashi could effortlessly toss him around.