Because the latter is unshakeable in Jeff Horn's (20-2-1) camp in a bitter build-up to his domestic boxing showdown with Tim Tszyu (15-0) at Townsville's North Queensland Stadium on Wednesday night.

More important than perceptions of bias at the judging tables that saw sparks fly between Horn's trainer Glenn Rushton and Tszyu's promoter Matt Rose at the weigh-in, is the end result.

For the winner edges closer to a shot at the world super welterweight crown. The loser is at a crossroads.

Tszyu, 25, is adamant he is ready for the leap in a battle to become the face of Australian boxing. Yet Horn's camp say Tszyu wouldn't be in this position if not for his last name, the one made famous by his Hall of Fame father.

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"He's very cocky and arrogant and I guess he is going to say everything he can to make himself feel better," Horn told The Canberra Times.

"It's a slap in the face to see what he has done in his career so far and to have him as the odds on favourite. I was quite shocked.

"I don't know what the bookies are doing, but I guess they don't really have the faith in me. I guess a lot of people are probably on that bandwagon as well. I love proving people wrong and I plan on doing exactly that again."

So how does he see himself doing it? Horn has rarely been outlandish enough to predict a knockout victory at all, let alone the round in which it comes. So for him, pre-fight predictions go no further than "my hand getting raised in the air".

That's when Lonergan's voice suddenly enters the conversation.

"Sixth-round knockout," Lonergan said.

Horn lets out a soft chuckle, his voice now bearing a raspy tone fit for the bout's more seasoned campaigner.

"My trainer and promoter love predicting me finishing it nice and early and that would be a dream come true," Horn said.

"I'm expecting a tough, hard fight, and that's the best way to go for me to get the knockout."

As if not quite satisfied by the humble words of a former school teacher who once sent the boxing world into meltdown when he stunned the legendary Manny Pacquiao, Lonergan pipes up again to declare Tszyu will finish flat on the canvas.

That stands as one thing Lonergan and Horn's trainer Glenn Rushton have rarely been short of. They felt their man had what it took to beat Terence Crawford in Las Vegas before Horn dropped his welterweight crown.

Post-fight assessments left them adamant triumph in a rematch was not beyond the Queenslander. A shift in weight classes had them spouting names like Canelo Alvarez before Horn dismantled Anthony Mundine and put on a pair of domestic classics with Michael Zerafa.

"They're very confident. I'm confident in myself as well, I know what I can do. I know he is probably out of his depth in this fight. Time will tell," Horn said.

Lonergan needs little invitation to pounce on one more chance to suggest Tszyu has made a career out of beating men he dubs "Sydney club fighters".

"There's your headline, 'out of his depth'," Lonergan said.

And so it becomes a battle of Australia's biggest names. Yet Tszyu is adamant this is not for his father, it is to fuel his own obsession to become the very best. For Horn? Tszyu "doesn't have what I am fighting for" - his own young family.

"They're my whole word, my family. They mean the most to me," Horn said.

"I know millions of other people out there are the same as me, they know what it's like to have families, they know what it's like to have children and a loving wife.

"Tim doesn't have that yet, he doesn't have what I'm fighting for. As much as I am fighting for my own name, I've got them in the forefront of my mind.

"Massive. They're what I'm fighting for in the end. They're my motivation for the win. There is no bigger motivation than that love in this world, and that's what I have for them.

"I will be raring to go and do my best to not get hit and hit Tim as fast as I can. The less hits the better and they'll be happier for it."