He didn't
Luffy is the main reason why Kaido is heavily heavily not Zoro
"Luffy still cant hurt this guy" is this a joke?
Luffy, to this point, couldn't hurt Kaido as much as Zoro did with a single attack which is just factual. Even after getting multiple PU's he still failed to do as much as Zoro did with one attack.
kaido is reaching his limit because of luffy
zoro not even alive now
Luffy took turns on Kaido 5 times with 3 seperate PU's, was allosed to land god knows how many attacks on Kaido's body, yet, Zoro in a single exchange managed to do more than Luffy ever did with one attack.
I never said that Zoro hurt Kaido more overall since Luffy's damage added up over time.
And it wasn't close to knocking off Kaido.
Means nothing and u know it. Drawing blood is much much better especially when the oponnent is the invincible Kaido with a hide that nobody can breach.