Even James "The Beast" Singh concedes he's facing mission impossible, but the flabby Fijian earnestly believes he can shock the world and produce one of boxing's great boilovers.
With a modest record of 12 wins and five defeats, Singh takes on a fearsome undefeated opponent in Sydney on Saturday night, who esteemed promoter Eddie Hearn is tipping could be a world heavyweight champion in the next "12 to 24 months".
Yet Singh is adamant he can take down Australian power puncher Teremoana Teremoana, who has won all six of his professional fights by knockout.
Singh conceded the two combatants presented as a physical mismatch at Friday's weigh-in, but is convinced he can conquer Teremoana on the George Kambosos Jr versus Jake Wyllie undercard at Qudos Bank Arena.
"Right now it looks impossible, until we get there tomorrow," the 30-year-old told AAP.
"I think my style can beat him. I'm a presser fighter and I'll stay in there with him.
"It's going to be hard for him to fight someone who is inside him for 24 hours."
A huge Parramatta Eels and Maika Sivo fan, Singh says he is fighting for his family.
But that's not all.
"The money is good, but I'm not here for the cash," Singh said.
A father of two young boys, he turned to boxing as a 12-year-old to get off the streets - "to stay out of trouble", he reckons.
That hasn't always worked.
In one of the more bizarre encounters, even by boxing standards, Singh and his opponent - countryman Semi Dauloma - were both disqualified in their last bout after things got out of hand.
According to officials reporting on the Fijian heavyweight battle in Sigatoka in August, "Singh hit Dauloloma whilst down, Dauloloma was in his corner pending a decision then ran across the ring and started throwing punches at Singh causing a brawl".
The fight was declared a no contest.
"I've never seen anything so wild in my life," Hearn said of the debacle.
"They both got disqualified, and then when they got disqualified they decided to go at it again.
"James Singh's got the fellow on the floor, he's just laying into him. I've never seen anything like it."
Singh is promising Teremoana similar mayhem on Saturday night.
"I'm coming for him," the underdog said.
"I know there's a lot of critics that think I'm just going to be a walk in the park for him, but I'm taking the fight to him."
With all six of his wins coming by way of knockout, Teremoana welcomed Singh's challenge.
"Old mate over there, thank you for coming all the way from Fiji but, yeah, James, you've got a bit of a task in front of you, mate,'' the Australian said.
"I hope that you come to fight. I hope that you throw some bombs because I know when you do if you want to come to fight me, I'm going to take you out earlier.
"So let's see how we go."
