Anthony Joshua has warned Kubrat Pulev that Saturday's world heavyweight title fight could be over quickly.
The pair had to be kept apart on a number of occasions during Friday's heated weigh-in, with the WBA, WBO, IBF and IBO holder booed by the Bulgarian's entourage before he stepped on the scales.
Concerns this bout at Wembley's SSE Arena may fail to ignite have been allayed and the Briton is eager to bring back his ruthless streak. The 31-year-old won his first 20 fights inside the distance, but his last four have brought two victories on points and the notable shock loss to Andy Ruiz Jr in June, 2019.
Asked about rival Tyson Fury's knockout against Deontay Wilder in February, Joshua responded: "Remember that took a long time for Tyson Fury to become destructive.
"I've been that destructive ever since I started boxing so I'm just going to do the job in the best way possible because, number one, remaining champion is important and, number two, getting the win is, in whatever fashion.
"But I'm ready for a 12-round fight if that is the case, and if a shot lands and causes a lot of damage I will be looking to take him out - that doesn't leave someone.
"Once a killer always a killer. I sleep good. Certain people can't sleep at night because they're really tuned up for a fight but I must be a good psychopath because I'm sleeping like a baby."
Joshua's motivation to produce a statement finish in front of 1,000 spectators will have have only increased following a fiery weigh-in.
He pointed in the face of the IBF mandatory challenger several times after Pulev's team booed and shouted in his direction once he entered the media zone at Matchroom's bio-secure bubble.
Meanwhile, Joshua has confirmed he will not take the knee ahead of the fight.
Joshua, who is of Nigerian heritage, attended a march in his hometown of Watford in June but explained why he would not take a knee tonight
I'm trying to do more tangible things," he said. "What we're trying to do is create a union to support British culture, that's important to showcase people from the Afro-Caribbean community as valuable members of British society.
"I think that's more important, that's what we're working on at the minute with different athletes, different people, different places."