Character Discussion - Zoro Brings the Best out of Sanji from Both a character and combative standpoint.
One Piece Chapter 1034: Sanji's new power-up gives Zoro's Advanced Conqueror's Haki a run for its money
One Piece: Zoro's End Of Series Power Level, Explained
One piece is nearing the Zou Arc. So far, do you think Oda has portrayed Zoro and Sanji as equals? - Quora
If Zoro is top tier than Sanji is too. If Zoro is capable of beating YC1s thant Sanji is too. If Luffy no diffs Sanji than he no diffs Zoro too. They
Zoro and Sanji : r/OnePiece
Could Sanji have won if he fought King instead of Zoro in One Piece?
One Piece: Why Sanji Is Closer To Zoro Than You Think
How strong is Sanji from One Piece? What's his power level and how does it compare to other characters like Luffy, Zoro, etc.? - Quora, one piece 1034
Straw Hats power levels and future growth!
Anime & Manga - One Piece 1058 and the big dilemma for Sanji fans
The Strongest Characters in One Piece