Former NZ Warriors star Wairangi Koopu and ex-All Blacks Rugby World Cup winner Keven Mealamu will take centrestage on Thursday night, as the main bout of 2022's Fight for Life charity event.
There's plenty of respect between Mealamu and Koopu - but come fight night, it's all on.
"We both want to put on a good performance," Koopu told Newshub. "But at the same time, I know he's not going to be pulling any punches."
Koopu has been here before, beating Māori All Black Matua Parkinson in the 2011 edition of Fight For Life.
The former Kiwis and Warriors star's motivation for coming back this time is personal, with the bout raising money and awareness for I Am Hope.
"I've been a massive advocate of theirs," Koopu continued. "I've gone to Mike [King] and Tai Topu, when I've needed them.
"I know the benefits of it. It means a lot - a hell of a lot - to me."
A host of other New Zealand celebrities are also looking to do their bit to change that through boxing. For Koopu, it's a chance to help the foundation that's helped him in the past.
"[I've had] a lot of advice in terms of handling my mental health. Then on top of that, references for therapists... just having somebody there who I feel like is a support mechanism."
While all the fighters are out to support the cause, Mealamu and fellow ex-All Black Liam Messam also have lofty ambitions in the sport, with a push at bigger professional bouts on the cards.
"I wish I could play rugby at a high level for as long as I can, but I can't," said Messam.
"This kind of scratches that itch. I love the high intensity and the high professionalism."
Mealamu knows he must get past Koopu first.
"I think, for the last four weeks especially, it's about being in the moment, not looking too far forward," he told Newshub. "Especially when you're in there sparring, just taking it day by day."
Mealamu has a laser focus for a bout that promises to bring out the best in both fighters.
Where to find help and support:
Shine (domestic violence) - 0508 744 633
Women's Refuge - 0800 733 843 (0800 REFUGE)
Need to Talk? - Call or text 1737
What's Up - 0800 WHATS UP (0800 942 8787)
Lifeline - 0800 543 354 or (09) 5222 999 within Auckland
Youthline - 0800 376 633, text 234, email talk@youthline.co.nz or online chat
Samaritans - 0800 726 666
Depression Helpline - 0800 111 757
Suicide Crisis Helpline - 0508 828 865 (0508 TAUTOKO)
Shakti Community Council - 0800 742 584
Join Newshub for live updates of Fight for Life from 6pm Thursday