Former undisputed heavyweight champion Mike Tyson has not interested in a potential exhibition fight with the likes of Sonny Bill Williams or Paul Gallen.

Recently, the 53-year-old retired fighter had discussed the desire to return to the ring, in a few exhibitions, to help raise money for charity.

Tyson, retired since 2005, has been training on a regular basis and appears to have transformed his body to proper form.

Once Tyson made his desire public, Melbourne promoter Brian Amatruda quickly offered up a seven figure offer to have Tyson come over to Australia to take part in an exhibition against All Blacks double Rugby World Cup winner Sonny Bill Williams, NRL great Paul Gallen or AFL legend Barry Hall.

Among the three, Williams has the most boxing experience with a 7-0 record with three knockouts. Williams, who won a tough decision over former Tyson opponent Frans Botha, has been out of the ring since 2015.

To make the event possible, Amatruda reached out to celebrity agent Max Markson, who brought Tyson to Australia in 2012.

Markson began negotiating with Tyson's team on behalf of Amatruda.

But the agent soon received a message from Tyson's people, who told him the boxing great wasn’t interested because of the suggested opponents.

The message reportedly said: “Mike read the story (in the Daily Mail) that he would be fighting a rugby player. He has said he would not do that as it would be an insult to boxing. He says if he does get back into the ring it will be with a real boxer.”

Tyson has also received an offer of $20 million from Bare Knuckle Fighting Championship. Based on Tyson's position with respect to his potential opponent, he probably won't have interest in a bare knuckle fight scenario.