Joe Calzaghe insists he will end Bernard Hopkins' legendary career when the pair meet in April.
Calzaghe and Hopkins, who squared-up at the weigh-in for Ricky Hatton's fight with Floyd Mayweather last year, came face-to-face in London as they promoted their Las Vegas showdown.
The Welsh world champion has no intention of surrendering his unbeaten record against veteran American Hopkins, who could quit should he lose on April 19.
"This is the night 'The Executioner' gets executed," said the world super-middleweight king, who will be stepping up to light-heavy for the first time.
Forty-three-year-old Hopkins, who made 20 defences of his middleweight title before establishing himself in a higher division, said defiantly: "The British are coming and I ask everyone to come and see the execution of the Brit."
But Calzaghe, 35, is determined to emulate former heavyweight great Rocky Marciano by ending his career unbeaten.
"I don't just keep fighting for the money. I want to be like Rocky Marciano, retire undefeated," said Calzaghe who plans two more fights.
Hopkins insisted he is relishing meeting another southpaw after beating left-handers Antonio Tarver, the former undisputed light-heavyweight champion, and ex-middleweight holder Ronald 'Winky' Wright.
"Why am I always picking on southpaws? I beat Wright easy and I'll beat Calzaghe," he said.
"All his previous American opponents have had to come to Wales. Let's see how Joe performs in a different world in the United States."

David slays Goliath
McCloskey v Rasillav - Luck of the Irish
Watt backs Haye for victory in Nuremberg
McCloskey v Rasillav
Behind the scenes with Valuev
David and Goliath preview
KO or bust for Booth
Haye - I'll chop down Valuev
Book David and Goliath at home and you could win a pair of the Hayemaker's official fight shorts...
We look back at what David Haye, Nikolai Valuev and just about anyone else has said about their showdown.
It's time for The Truth, as we assess the weigh-in and all the options on the eve of David and Goliath...