"I guess the days of the 15-round heavyweight bouts are over, but I remember them," the Arkansas head coach said after practice Thursday.
The point of the discussion is Saturday's football game with Auburn. He said the Hogs need to be ready for a heavyweight bout.
"We've talked all week about it going all four quarters," Petrino said. "We haven't been where we wanted to be for all four quarters except for maybe Georgia.
"You are going to take some shots and they are going to land some, but you have to respond. You have to be ready to hit back with some shots. We are going to be ready for a battle."
In this case, it's a football game. And perhaps Petrino was not talking about taking some shots down the field, but that's what he said the Hogs need to do. Petrino said it will take an offense that can do a lot of things well to solve a good Auburn defense.
"They are going to be good up front and we'll have to protect well," he said. "They don't give up big plays because they are good at linebacker and experienced enough in the secondary that they can mix up coverages. So we have to be patient. At the same time, we are going to take some shots down the field."
"It will be," Petrino said. "The last time we were down there, two years ago, we did a good job of executing early and we got the crowd quiet. We have to do a good job early this time and it will get them quiet again.
"We've worked hard all week on our cadence. Ryan (Mallett) has done a good job. Our line has done a good job of listening and concentrating on him."
Petrino knows turnovers will play a factor.
"We know turnovers are a team effort," he said. "You have to do everything right. You have to protect, you have to catch it and not tip the ball and the quarterback has to make good decisions. It's a team thing."
The Hogs are healthy. Free safety Tramain Thomas missed some time early in the week because of illness, but is ready for the game.
Petrino said excitement is building for the trip.
"Our players understand these are the games they've worked so hard the last two and a half years to get to play in," he said. "They put in the work in the winter, spring and summer to get to this type of game.
"They learned in the Alabama game that it's important to concentrate all four quarters. It'll take all of them concentrating all the way until the end of the game."
Petrino was asked if his team feared Auburn quarterback Cam Newton.
"He's unique because he's both powerful as a runner and a talented passer," Petrino said. "But nothing scares us. You look forward to the challenge. We are concerned about him, but not scared. We have to utilize our technique and stay in our gaps."