The New Zealand grudge match between Joseph Parker and Junior Fa has been rescheduled to December 12 at Auckland's Spark Arena. (photo by photosport)
The fight was set down for Friday, December 11 - but the organizers wanted to avoid a conflict with All Blacks' Rugby Championship fixture.
It took several months for a deal to get finalized, with both sides haggling over money and even the brand of gloves.
Parker and Fa collided four times in the amateurs, with each boxer securing two wins.
The fight will be carried by DAZN in the United States, while New Zealand will distribute the fight on pay-per-view.
Parker, a former WBO heavyweight champion, last fought in February, when he scored a TKO win over Shawndell Winters in Texas.
Fa, with an unbeaten 19-0 record, picked up a unanimous decision win over Devin Vargas in November of last year.
Both are ranked in the WBO's top ten.
Parker views the contest was a must-win situation - as a loss to the untested Fa would seriously damage his career.
"There are lots of reasons to shift this once-in-a-generation event from Friday to Saturday night," said Parker's promoter Dave Higgins to Newshub.
"We originally decided against Saturday, as there was a strong possibility that the show would conflict with an All Blacks test match. Knowing how keen all Kiwis will be to see these two great heavyweights sort our their long-standing rivalry, as well as support the All Blacks, a clash between two massive sport events was a scenario we were keen to avoid.
"This is the biggest heavyweight contest in New Zealand history and we think it has the chance to break the current New Zealand pay-per-view record."