Lisa Lewis will fight Mia St John a five time boxing world champion, despite having no experience.

Lisa Lewis once ran across Waikato stadium in a bikini while the All Blacks played Ireland at Waikato Stadium.

It was June 2006 and Lewis, who works in the sex industry, was on a date. Streaking was on her bucket list. The relationship wasn't.

Fast forward 10 years and a lot has happened on and off the pole. Lewis is now pulling on boxing gloves for charity.

MIA ST JOHN/FACEBOOK Lisa Lewis will face off against Mia St John.

"Before I ran across Waikato Stadium everybody knew me as Sapphire, the stripper on the stage. So I was already known. I have been in the industry since I was 17. Now I'm 35," Lewis said.

"Everybody keeps asking if I am going to do an anniversary streak. No, no way. I got a conviction for that. If the All Blacks were playing Ireland in June I would probably consider it. Not Wales. Just kidding."

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Lewis, a mother of one, took Hamilton by storm back then.

Today Lewis proclaims to be much wiser than her younger self and she is back in the headlines.

Lewis, a promoter for the Royal Rampage boxing event, wasn't supposed to be fighting in it.

A New Zealand fighter pulled out three weeks before the bout. Without thinking it through Lewis offered herself up as the sacrificial lamb. A decision she once regretted, but is now is relishing.

Lewis, has never had a professional boxing fight. She will face five time boxing world champion Mia St John - also a former Playboy centrefold.

The big debut will happen on April 16, at Trusts Arena, in Auckland.

Lewis is optimistic about her chances, despite her lack of experience and having only trained over the past three weeks.

"You realise if I win this fight. I will go from zero fights to one of the top ten boxers in the world. It will be massive for the sport of women's boxing. It's massive for tourism in New Zealand and massive for New Zealand," Lewis said.

"Funny thing is - I'm not afraid at all. I'm looking forward to it and although many coaches have told me that I should pull out and let a professional boxer with good stats fight the 64 fight record - I have never felt so sure about something in my life. You know why? I've got the biggest balls of them all."

Lewis who is Hamilton based, admits she has to talk tough. It's part of the promotion. It's a lure for more ticket sales.

The event has so far raised $10,000 for Women's Refuge.

In preparation for her big fight Lewis contacted trainer Dean Northover at Mana Tangata Boxing Club in Te Rapa.

They both admit her first session was "terrible".

However, Northover said Lewis had come a long way and was putting in a punishing regime to ready herself for her first fight.

"The safety of the fighter is paramount," said Northover.

Lewis said her 48 year old opponent, with 64 professional fights under her belt, has been training for her Royal Rampage appearance since October.

"She is the queen of the ring."

Also on the card for Saturday is Hamilton resident Kirsty Lupeamanu.

She will take on Nailini Helu from Auckland who has stepped up after the withdrawal of Michelle Montague from Matamata.

Lisa Lewis plans to continue her boxing career in a Mana Tangata event at the Hamilton Cosmopolitan Club on July 30.

For information and tickets to Saturday's event in Auckland visit royalrampage.co.nz