Eddie Hearn, promoter for WBA, IBO, IBF Anthony Joshua, is hoping that David Higgins - promoter for WBO champion Joseph Parker - makes his knockout prediction to the British superstar's face next Tuesday during the final press conference.
Joshua and Parker will collide in a high stakes unification clash in Cardiff, Wales on March 31.
Higgins has long claimed that he believes Parker will walk away with a knockout victory.
Hearn wants Higgins to man up and make these claims to Joshua's face - because the British claims they are constantly being made by way of email.
"I like David Higgins and I want him to speak up," Hearn told Sky Sports. "I want him to look Anthony Joshua in the eye and tell him the banterish stuff he says to me.
"I just told Anthony that he basically said you are going to get knocked spark out, and Joshua said: 'Okay, let's hear it next Tuesday then at the press conference.'
"I'm giving him notice and I'm saying next Tuesday we want to hear it, from you and Joseph Parker."
Before the fight was made, Higgins and Parker were very vocal about Joshua's chin - claiming the British boxer had a glass jaw. They even held a press conference in New Zealand to discuss Joshua's lack of punch resistance.
But after the contest was finalized, there has been very little trash talk from Parker and his handlers.
"You cannot say all this stuff in the build-up to get the fight and when the deal is done, go quiet," said Hearn.
"Parker and his team believe 100 percent they are going to knock Anthony Joshua out and he's been exactly the same. There is a nice little mix there between him and me, and what I did was filled Anthony in on something that Mr Higgins has said, and I think it's added a little bit of spite.
"They are on notice. I want you to look in the eyes of Anthony Joshua and tell him what you truly believe will happen in this fight."