Yet we all know that Zoro will become the strongest swordsman of all time, surpassing Mihawk, Venus, Ryuuma, Roger, Xebec and every other swordsman. It's shounen 101, and Oda himself has alluded to it many times:
Exhibit A - Strongest swordsman ever
Exhibit B - Greater than the greatest
There is not a chance that EoS Zoro loses to any swordsman ever, that'd be actual insanity lol. Ryuuma, Zoro's parallel, was the sword god and equated to Joyboy on Wano.