Former world champion Anthony Mundine has once again created controversy, by stating that he won't stand for the national anthem before his rematch against rival Danny Green on Friday at Adelaide Oval.

The former professional rugby league player told SBS the anthem was an insult to Indigenous people, and should be changed.

"'Advance Australia Fair', if you speak to your historians and educated college professors, (it's) fair  - as in white fair - not as in fair go," he said. "That was the theme song for the white Australia policy, from 1901 to the early 1970s when Aboriginal people weren't even considered citizens.

"Personally, I don't think it's right. I don't think it's just for my people, I don't think it's just for myself and my ancestors. I would like to see it changed for the better of Australian society. I'm a man that stands against wrongs, and I think that's a big wrong in our country."

Mundine, who faces Green on February 3rd in a rematch of their 2006 bout, said the move was aimed at educating and uniting people.

"I'm about uniting people together, uniting the country together," he said.

"Do your research on the anthem, 'we're young and free', we're far from young and a lot of us ain't free.

"I don't think it will divide, I hope it will just educate people. These questions have never been asked before, no-one's ever stood up, I can't speak for everybody. This is my opinion, my stance. I don't talk for anybody else.

"I got asked the question, you know me, I speak the truth. I'm a straight shooter, I'm not gonna shy away from an important discussion and a major point in society. In order for us to move forward as people, in order to unite and live in better harmony than what it is today - as you see the world with what's going with racism - then we need to make major changes."

He's called on singer Jessica Mauboy to not go ahead with singing the anthem in front of thousands of spectators on Friday because "it's not for our people. They are just using her because she is black."

"I can't talk for Jess, I've researched this, she may not know the facts but I do," he said. "If she wants to do that, then that's on her, but I wanna educate her and everyone else."

Green responded to the move, saying: "It's not my issue to worry about, my issue now is to focus on the fight, to be switched on. I know I'll be standing and I'll be singing the anthem. That's all I care about."

When Seven Network asked One Nation leader and senator Pauline Hanson about Mundine's stance, she replied: "Who cares what Anthony Mundine is saying?"