After more than a month of verbal warfare, the two undefeated combatants will finally go toe to toe for the Australian heavyweight title at Sydney's International Convention Centre.

There is more than Huni's belt on the line in what shapes as a bitter blockbuster.

Having conquered UFC legend Mark Hunt and one-time world heavyweight champion Lucas Browne in his past two fights, Gallen is adamant he can shatter Huni's Olympic dream as well.

The 22-year-old is considered a gold medal contender in Tokyo and says he's looking forward to seeing Gallen "on the canvas, face down" on Wednesday night.

But Gallen doubts Huni will cope on the biggest stage of his pro career, under the glare of pay-per-view for the first time and in front of several thousand fans at the Aware Super Theatre.

"Oh, that's what he wants to do. That's his plan but I don't see that happening at all," Gallen said of Huni's KO prediction.

"He hasn't dropped one similar opponent. Even in all of his amateur fights.

"People don't think I know about this bloke. He's had one stoppage since he was an amateur - one - in all his fights.

"He's clearly not a puncher, clearly not a puncher, so I don't see that happening.

"He can't handle pressure, can't handle the expectation. I'm going to apply pressure to him in the fight and expose him.

"I told you from the start, he's an unbelievable fighter, skilful, fast. He's got everything. But there's a chink in that armour.

"In the past, he's been in no-show. He was a no-show (on Monday night on NRL 360).

"I've found a little chink, he doesn't like the pressure and I've got to try and expose it."

All this after Gallen on Monday vowed to break Huni's jaw, his face, his arm - "whatever it takes" - to ensure he doesn't even make it to Tokyo.

Huni insists he's unfazed, barely even listening to Gallen's trash talking.

"If he says all that stuff and then can't back it up, he's a fraud," Huni said.

"He can say what he wants to say. They've all said something about my (supposed lack of) power, but they haven't been able to beat me.

"What good is power if you can't land your shots?

"He might have more power than me, but he's not fought anyone with footwork. What good is power if you can't land it?"

Huni does accept, however, squaring off with Gallen a month before heading to the Olympics is a gamble.

"There's always a risk getting into the ring, but that's what we do all the training for, to make it less of a risk," he said.

"I'm going to try (cop) as least much damage as I can ... stay long, box well, keep him at the end of my punches.

"Obviously he's going to try and apply that pressure, but I think that's going to work against him."

Australian Associated Press