Anthony Joshua has instructed Deontay Wilder not to engage in the hype surrounding a future fight between the two until a contractual agreement has been officially signed.
The WBA and IBF heavyweight world champion is solely intent on preparing himself to face Joseph Parker in a unification bout later this month.
Wilder will be at ringside for the fight as part of Sky Sports' punditry team, and there has already been a suggestion he could enter the ring after the fight to square up to the Brit.
But Joshua would prefer it if his American rival only entered the ring if a deal is actually in place for them to face each other.
''He's been at my [Wladimir] Klitschko fight and I've watched him in Sheffield when he fought Audley Harrison,'' Joshua told Sky Sports.
"He's flying over to come and watch me fight Joseph Parker, and this is what it's about - it's building up to that big clash.
"I'm a unified heavyweight champion. We're talking about an undisputed heavyweight champion, and that's what we're building towards.
"Yes, he's more than welcome, but the difference is - when Klitschko come over to watch me in Manchester, we had signed a deal. It was signed and sealed, provided I won.
"With Wilder, I'm just not into the hype. If he wants to come over, get in the ring and all that stuff - I just prefer it if he had a fight in place to talk about, because if not, it's just hype."
Negotiations between the two, to this point, haven't materialised into any concrete due to financial implications.
But Joshua is still confident that a contract can be signed.
"No-one wants to hear about - this percentage, who is ring walking first," he added.
"They just want to know that we're going to fight. They don't care about the business and all that stuff that goes on in the background.
"That's why I don't want to get into the ring and turn it into a hype job. I want to give the fans what they want.
"I have been in touch with their camp since last December after I fought [Carlos] Takam, and it's something that we have been working on slowly, and we'll get there for sure."
All eyes will certainly be on Wilder post-fight but AJ must first deal with the formidable challenge Joseph Parker has to offer.