Bessie Manu, the smiley face of netball, will turn savage on Friday night.
The Tactix netballer and her old teammate Charlotte Kight top the bill for the Fight for Christchurch, which has already raised $90,000 for charities.
Manu, who will be walked out for the fight by her brother Nasi Manu and his Canterbury rugby teammate Robbie Fruean, says she won't be holding back.
"It worried me at the beginning when I started sparring, but you can't afford to think of things like that," she said. "Like netball, when you're on the court you've got to do the job."
Coached by former kickboxing champ Wayne Vaega for the last 10 weeks, she's also been getting tips from her brother. "Everyone in rugby is an expert on boxing now," she quipped.