One Piece Chapter 51, page 11: Roronoa Zoro Falls Into the Sea

Zoro prepares his next attack, raising his swords high and declaring, "TORA" (tiger) "GARI" (hunting). Luffy watches with a wide, proud grin, shouting, "World's strongest swordsman! Sounds great! If you're gonna be the Pirate King's shipmate, you should be able to accomplish at least that much! Otherwise, it'll be embarrassing for me!" Zoro smiles through his pain, thinking, "The world's greatest..."