I don't know who wins but I will say that it would have been on of thee greatest boxing matches in history. I lean towards Duran though...
This is one of the ultimate fantasy matchups. I would have to go with Roberto in an almighty tussle. Simply because he is the better of the two.
Unbelievable as it sounds. If he beat Chavez, that would only be Duran's second win over a great. It isn't like he beats many greats. He beat only one great-SRL, who then beat him easily when he fought a technical fight. Something people surprisingly do not seem to notice. It is significant, especially in his ATG ranking.