The charity boxing match between Great Britain prop Stuart Fielden and England second rower Lee Radford has a new venue due to huge public interest.
The fight - to raise funds for ex-rugby league star Steve Prescott who has stomach cancer - was to have taken place at Hull's KC Stadium.
But it will now be held at the nearby Hull Arena, where it is hoped 2,000 people will attend. The event is scheduled for early in the new year on February 2.
Organiser Mike Smith said the decision to switch venues came after he received a huge number of calls from the public about the bout.
"We knew this would attract a certain amount of attention, but certainly not to this extent," said Smith.
"My phone was ringing all weekend with people reserving tables and generally asking about the event.
"It has to be said the KC Stadium were very helpful but the sheer numbers made the decision an easy one.
"There will now be an option for people to purchase tickets for the boxing side of the show and still the other option for those wishing to take tables."
Fielden, who became the world's most expensive forward when he moved from Bradford to Wigan last season, is one of league's toughest stars.
Hull star Radford was part of the Federation Shield-winning England team that overcame a very physical Tonga side.
"We are going to enjoy it and hopefully raise plenty of money for a great friend."
The event for ex-Hull and St Helens favourite Prescott will also feature an undercard featuring professional boxing, a set from comedian Mike Lodge, speeches from rugby league legends and an auction including sporting memorabilia.