Joseph Parker's manager David Higgins believes May 1, 2021 could be the date of Dereck Chisora's very last professional fight.
Chisora and Parker will do battle in the main event in Manchester that night, with the winner moving back towards contendership for a world heavyweight championship following the Anthony Joshua/Tyson Fury unification situation.
Chisora is 37 and unlike his next opponent, has yet to taste world title glory. Higgins told the Ringside Toe 2 Toe podcast that a loss to New Zealand's Parker could cause him to give up the chase for good.
"On his day, he [Chisora] can show up and knock someone out, like he did against Carlos Takam and so we've always got to be wary of that," Higgins explained.
"But provided that Joseph Parker does not make a silly mistake, and executes his game-plan, then I see him retiring Dereck Chisora."
Chisora is currently managed by former heavyweight and cruiserweight champ Haye, who beat Chisora in a memorable grudge fight at West Ham United's Boelyn Ground in 2012.
And Higgins included Haye in his taunts, adding: "I'm not sure what David Haye does, besides managing Chisora, and so because I like the bloke I might offer him a job with Duco Events.
"David Haye is welcome to come and work here in New Zealand, for me, after the fight."
Haye also appeared on the podcast, however, and simply warned that he and Chisora hope Parker tries to fight, rather than box.
"It's going to need to be a sustained beating and he's [Chisora] going to need to get deep down and dirty," said Haye on the show.
"I hope that Parker wants to stand and have a punch-up with Derek. If he tries to outbox him, it could be pretty ugly, so I'm hoping he wants to stand there.
"I'm hoping he wants to make a statement to the heavyweights out there, 'I'm going to go out there and take Derek Chisora out'. If he does that, we've got ourselves a beautiful showdown."
Chisora vs. Haye airs live on Sky Sports Box Office in the UK and Ireland, Spark Sport in New Zealand and on DAZN everywhere else except Samoa.