Anthony Mundine has explained why he won't be standing for the national anthem during Friday night's grudge bout against Danny Green.

The firebrand boxer says he's trying to educate people that Advance Australia Fair is a theme song for the white Australia policy which is unjust to indigenous Australians.

'I am a man that stands against wrong and I think that is a big wrong in our country. And I can't stand for something that I don't believe in,' Mundine told reporters in Adelaide on Monday.

Anthony Mundine has explained why he won't be standing for the national anthem during Friday night's grudge bout against Danny Green

The indigenous boxer said Advance Australia Fair was a theme song for the white Australia policy

Danny Green shadow-boxes during a public workout ahead of the highly-anticipated clash

'"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 told SBS.

'That was the theme song for the white Australia policy, from 1901 to the early 1970s when Aboriginal people weren't even considered citizens.'

The Indigenous boxer, and former rugby league star, also said Jessica Mauboy was chosen to sing the anthem in Adelaide on Friday 'because she is black'.

He called on Mauboy to not go ahead with singing the anthem at the Friday match in Adelaide because 'it's not for our people'.

'They are just using her because she is black,' Mundine told Daily Telegraph.

Mundine said he was not trying to divide Australians but his people are not 'young and free'.

'That was the theme song for the white Australia policy': Mundine says he's trying to educate people (Mundine is pictured in September last year at his Redfern gym)

Mundine speaks to a crowd of reporters in Adelaide following his public workout on Monday

'They are just using her because she is black,' Mundine said of Jessica Mauboy (pictured singing carols at The Domain in December last year)

Event organisers and Foxtel are now reportedly in talks to find a resolution and it's possible the anthem will be performed before opponents enter the ring.

'Who cares what Anthony Mundine is saying?' One Nation Senator Pauline Hanson told Sunrise.

'That is his opinion, but the fact is, we have teachers in schools who are telling kids, children, you don't have to stand for the national anthem. They're saying if you find it offensive, don't stand and leave the classroom.

'We are saying this in our classrooms. Why should we worry about what Anthony Mundine is saying? I am more concerned about what the kids are being taught in our classrooms.'

In a press conference on Monday afternoon, Prime Minister Malcolm Turnbull said he did not agree with Mundine.

'Our national anthem unites all Australians, I don't agree with him.

'From our First Australians, to the newest baby in the arms of a migrant mother.'

Not the first time: In September, Mundine encouraged NRL and AFL players to boycott the anthem at the grand finals in a Facebook post

At the time Mundine said the national anthem was written when 'blackfullas were considered fauna (animals)'

Danny Green takes pictures with spectators at a public workout in Adelaide

In September, Mundine encouraged NRL and AFL players to boycott the anthem at the grand finals.

'The anthem was written in late 1700s where blackfullas were considered fauna (animals). Advance Australia Fair as in white not fair as in fair go,' Mundine wrote on Facebook.

'All players aboriginal & non aboriginal should boycott the anthem & start changing Australia's ignorant mentality... lets move forward together yo.'

Former league players Larry Corowa and Joe Williams joined in the call for players to boycott the anthem.

Mr Turnbull criticised the boycott in September, and Today Show host Karl Stefanovic called it 'ridiculous'.

Mundine and Green last competed in 2006, more than 10 years ago.

Daily Mail Australia has contacted Foxtel, Danny Green and Jessica Mauboy teams for comment.