Robbie Peden has become Australia's newest boxing world champion, stopping American Nate Campbell to claim the IBF super featherweight title in a decision that left the American fuming with perceived bias refereeing.

Referee Johnny Wright stopped the fight seven seconds from the end of the eighth round, with Campbell bleeding profusely from cuts to the left and right eyes and the nose and taking punishment.

After the fight, the Queenslander - a $2.60 outsider for this vacant title - said "this is the beginning".

"None of them would give me a shot at the title because I'm a hard fight," Peden said.

"Now they can come to me, I'll put my belt on the line."

Peden's pride was matched by Campbell's anger, blasting the referee after the fight for deducting a point from the American for a headbutt and cautioning him hitting with the heel of his hand.

"It was hard for me to fight everybody - you can't fight the referee," Campbell said.

"I would never fight here again, never, not against anybody.

"I was done a grave injustice tonight.

"I feel like I was taken advantage of.

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