Eden Park is firming as the likely venue for the Joseph Parker-Andy Ruiz world championship showdown.
Duco Events' Dean Lonergan has hinted strongly that the December 10 bout in Auckland will be held at an outdoor venue.
Vector Arena, Eden Park and Mt Smart have been mooted as likely venues for an event some claim will be the biggest in New Zealand sporting history.
All three venues are free on December 10.
American boxing websites are reporting the fight will happen at Vector Arena, but the indoor stadium's limited capacity could be an impediment.