One Piece: Zoro's End Of Series Power Level, Explained

Zoro's power by the end of One Piece will be comparable to that of a Yonko.

Shusui, One Piece Wiki

Zoro vs Sanji: Who Would Win in a One Piece Fight?

Oda Has Revealed Zoro and Sanji's NEW Devil Fruit Powers: Here's Why! (One Piece)

One Piece: Why Luffy and Zoro Will Never Be Equal, Explained

Roronoa Zoro (Pre-Timeskip), VS Battles Wiki

The hints that Oda has dropped that says Zoro and Sanji are rivals or that Zoro and Sanji are close to each other in strength - An Analysis of Oda's mind

One Piece: The Final Power-Up For Every Straw Hat

Zoro Becomes God-like With This NEW Power Up! Every Special Eye in One Piece Explained

One Piece: How Strong Is Zoro's New King of Hell: Three Sword Style Explained - Anime Explained

When they have equal footing (no devil fruit), who is strongest among Roronoa Zoro, Sanji, and Luffy in the One Piece series? - Quora

Luffy And Zoro: 7 Reasons Why They Will Find One Piece

Who is Zoro in One Piece? - Quora

One Piece: Zoro's End Of Series Power Level, Explained

Roronoa Zoro (Post-Timeskip), VS Battles Wiki