LAS VEGAS -- Three bruising battles left Muhammad Ali and Joe Frazier bitter enemies outside the ring, and those hard feelings still have not subsided 30 years after their trilogy ended.
But on the flip side, Arturo Gatti and Micky Ward became close friends following three bloody fights.
They play golf together, and Ward, who retired after their third fight, became a regular visitor to Gatti's training camps. He even walked Gatti into the ring when he fought for a world title. Such is the bond they developed.
As Ward once said: "We know each other like no one else does because of our fights. It's a bond you don't understand until you go through it. After fights like ours, you can become enemies or become really close. We became really close."
Lightweight champion Diego Corrales (40-2, 33 KOs) and former two-time champion Jose Luis Castillo (52-7-1, 46 KOs), who meet Saturday night (Showtime PPV, 9 ET) at the Thomas & Mack Center in a rematch, appear headed more down the Gatti-Ward road than the Ali-Frazier one.
"I like him," Castillo said of Corrales. "We respect each other. It's possible one day we will be talking about our fights, having some beers and getting drunk."
That's hard to imagine after the punishment they doled out to one another last May in one of the most hellacious fights in boxing history. It ended with Corrales mounting an amazing 10th-round comeback after suffering two knockdowns earlier in the round.
Corrales and Castillo, however, have been able to separate what goes on in the ring from their personal feelings.
They showed immense respect for each other immediately following the first fight -- Corrales calling it "an honor" to fight Castillo -- and it has carried over to the rematch promotion.
Instead of trash-talking each other this week, they happily posed for photos at the final press conference on Wednesday. And rather than scowling at each other, they broke up laughing several times while patting each other on the back.
They each know what is coming Saturday night, but when it's over they said the respect for each other will remain.
"I wouldn't say he is my friend because we haven't spent a lot of time together, but I respect him a lot and he seems like a really nice guy," Castillo said. "Whoever wins or loses, I would like to be his friend."
Said Corrales: "I respect him a lot. I think we could even be friends. Honest truth, when it's all said and done, I'll be in Mexicali somewhere sitting with Castillo having a beer."
Dan Rafael is the boxing writer for ESPN.com.