Captain Morgan may have been a tough guy back in the day but even he wasn’t a match for a swordsman who was as skilled as Zoro. Zoro’s three sword style is just way too difficult to get past. He has speed and Haki as well which will allow him to block any of Morgan’s hits with ease. As skilled as Morgan may have been, he’s severely outclassed in every single attribute. That’s why he will be doomed here. Zoro wins.