Comparing 1983 Hagler to 2013, obviously you have to give the edge to Hagler. He was a monster in his prime who was killing everyone, whereas there are big questions now as to whether or not Martinez is on the decline. So who was the bigger challenge? You'd be a fool not to pick 1983 Hagler. He was a beast. I have no doubts about Duran's courage. He probably would have fought Holmes or Tyson if they let him. And while it was an admirable attempt, he did come up short. I could speculate all day about how Hagler probably underestimated him, but I'll stick with the facts. In terms of taking up challenges, Duran blows Mayweather away. I'm not saying Floyd was tougher than Duran, I'm just saying he was a better fighter.

In terms of Floyd's defining wins, in chronological order I would have to go with...

1. Genaro Hernandez
2. Deigo Corrales
3. Jose Luis Castillo
4. Arturo Gatti
5. De La Hoya
6. Ricky Hatton

Now keep in mind, these aren't the ones I necessarily think were the hardest, or even necessarily his best performances, just his most defining/important wins. For instance, obviously I think beating Shane Mosley, Cotto, Guerrero, ect is more impressive than Gatti, but it has to be acknowledged that the Gatti fight was a huge win for him in terms of getting his name over with the general public.