Joseph Parker and Santa are set to go head to head as the heavyweight title fight coincides with Auckland's Christmas in the Park.
Duco owner David Higgins predicts the audience for Coca-Cola's Christmas in the Park will halve on December 10, as the nation tunes in to watch Parker fight Andy Ruiz Jr at Vector Arena.
"We have a once-in-history event, which is truly unique and will capture the nation.
"I'd be worried if I was Christmas in the Park. It is a wonderful event but has been running a long time ... it happens every year. Many will choose the boxing as an historic moment."
Higgins compared the fight to the world heavyweight title bout between David Tua and Lennox Lewis in 2000, which he said stopped the nation.