fight at shabondy archipielago
both at their old versions.
Rayleigh should win, his fight with Kizaru was a stalemate with neither side having a clear advantage, however Zetto's fight with Boraslino was one sided, Kizaru was overwhelming Zetto, Z only managing to get in a few hits that didn't even faze Kizaru, not to mention that Rayleigh is still far more adept and skilled than Luffy, Luffy who managed to beat Zetto in a fist fight, albeit barely
@ImDictatorBowDown: Kizaru was barely doing anything to Z in the fight, the only reason he was actually starting to lose was because he was getting old, and needed that inhaler a lot. rayleigh never actually hit kizaru either save for when he stopped his light speed kick. also luffy beating Z was PIS since he got back up and started fighting again, not to mention he took a town level attack from kizaru and still kept fighting