Who was Hagler`s best opponent?

Are you asking who is greater, or who is the better h2h opponent the night they fought Hagler? Because those are very different.

Leonard vs. Durán in terms of their ATG placement has been done to death. If you mean "was the Leonard that fought Hagler or the Durán that fought Hagler a better p4p fighter" that's a bit more unusual and interesting.

 

John the beast Mugabi gave Hagler his toughest title challenge. That fight took a lot out of Hagler.

 

Duran was the greatest fighter Hagler faced, though it could be argued Roberto was both past it and well out if his realm at the time.

 

Duran was actually winning after 12 rounds.

Hearns was the best he faced though, Hearns or Briscoe. In the ring on the nights

 

Briscoe was just a predictable robot
Duran was too far gone

a far better opponent was Roldan:
strong
powerful
power in both hands
hard to hit
limitless stamina and hard to deal with, hard to form a defense and retaliate with counters

All around best opponent: Roldan

 

John is my runner up

well trained and conditioned

MAYBE as hard a hitter as Hart except had power in BOTH hands and had better stamina

young and undefeated

 

Juan Domingo Roldan gave the peak Marvin a very hairy evening and was arguably fouled out of the fight.

 

I think that the best that Marvelous Marvin Hagler had ever fought was Vito Antuofermo on Nov 30 1979. Vito stood and fought him, was very tenacious, using the same grit that had won him the title from Hugo Corro on June 30 1979 in Monte Carlo, Monaco. The fight though controversial was tough, both displayed the wage of war on their faces. The rematch in 1981 was all Hagler without a doubt.

 

Vito was a very brave fellow but that decision was a bit of a shocker.

 

Truer words, but I have never been one to argue against an official decision rendered by a boxing official, even against any favorite fighter of mine, that would be considered poor sportsmanship. I am not a licensed boxing official, just a fan of the sport, my opinion will not matter on the boxers record, the official verdict will.

 

No criticism of Vito. He didn't give the decision.

 

Chris Finnegan?

 

Leonard.