Boxing: Joseph Parker tipped for upset victory as Deontay Wilder takes height, reach advantage into heavyweight clash

The weigh-ins have been completed, the final trash has been talked, just over 12 hours out from one of Joseph Parker's biggest fights of his career.

The 'Day of Reckoning' showdown against hard-hitting heavyweight Deontay Wilder in Saudi Arabia is a make-or-break bout to keep his future title hopes alive.

At 111 kgs, Parker is bigger than his opponent, but despite Wilder weighing in at just 97kgs, his team insist he's lean and mean.

"This is a weight where he will give out his most decapitation work," said trainer Malik Scott. "Tomorrow is going to be no different."

As well as being 8cm taller, Wilder has a significant 20cm advantage in reach, and is promising to use it to add a 43rd knockout to his career record.

"I come to bring the pain, I come to bring the excitement," he said. "Like I always say, don't blink baby, 'cause bam, baby, good night."

But while much of the prefight analysis has been devoted to how Parker can avoid Wilder's right hand, the Kiwi's trainer says he won't spend the night bobbing and weaving.

"Fight fire with fire," said Andy Lee. "Let your hands go. You won't be surprised if Joseph Parker gets the KO.

"We expect it."

And that's got some commentators backing the Kiwi.

"I think we could have an upset here," said pundit Ade Oladipo. "I think Parker can cause a big problem. I also feel like Parker has got the power to hurt Wilder.

"And no one is talking about that."

Jarell 'Big baby' Miler did his best to ensure people were talking about him, after weighing in at 151kg, the American was keen to throw his weight around.

Fellow Kiwi Junior Fa tipped the scales at 126kg, some 18 kgs heavier than his opponent Frank Sanchez, on a day where there was no shortage of heavyweight beef.