Anthony Mundine says he was robbed.

Mundine lost on points to bitter boxing rival Danny Green on Friday night in a decision greeted by dismay in some quarters.

Green was declared the winner with three judges scoring 94-94, 96-94 and 98-90, exacting some revenge for his 2006 loss to Mundine.

But many boxing pundits, and Mundine, believe Green lost the fight.

"I thought I won that fight and it's 2-0 ... I deserved it," Mundine told Fox Sports.

"But history will tell a different story.

"People know in their hearts ... they know who was the better man.''

The scoring of the judge that awarded the fight to Green 98-90 was particularly mystifying in a largely even bout.

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And a photo of the scorecard showed the 96-94 judge awarded Green a maximum 10 points in a round when he was penalised a point for elbowing.

"What do you do ... when you give a performance like that, I had him beat up, I had him bleeding, his eyes were puffy,'' Mundine said.

"I still won the fight hands down ... they robbed me.

"I know I won it. He (Green) knows I won it. That is what makes it so tough."

Six arrested at bout

Meanwhile, six people were arrested at the highly anticipated boxing bout at Adelaide Oval, where several fights broke out among spectators.

South Australian police said three bikie gang members were denied entry to the oval after being identified by detectives from the Crime Gangs Task Force.

Another four gang members — two from interstate — were evicted from the venue.

"Unfortunately at the commencement of the main event, a number patrons in the crowd thought it was their time to get involved in a number of fights," police said.

But police said they were "generally pleased" with the behaviour of those who attended.

AAP/ABC