Dillian Whyte may not be Tyson Fury's next opponent, according to promoter Bob Arum.
The WBC have ordered Fury to fight Whyte next after the latter was installed as mandatory challenger.
Whyte, 33, will finally get his chance of fighting for world honours after initially becoming No.1 challenger for the belt in 2017.
The "Bodysnatcher" lost his position following a KO defeat to Alexander Povetkin in 2020 before avenging it earlier this year.
Regardless of negotiations, Arum has insisted Fury will be back in action by March with Andy Ruiz Jr and Joseph Parker in line.
Eddie Hearn exclusively told Planet Sport that there was still some work to do for Fury-Whyte to happen.
"If we can't come to a deal with Dillian Whyte, we'll do a fight for the Ring Magazine belt and the 'lineal' title and we'll pick another opponent," Arum told talkSPORT.
"We've gotta get Tyson back in the ring by the end of March… Frank [Warren] and I are determined to come to him with an opponent that's acceptable and we'd love to do that fight in Cardiff.
"Andy Ruiz Jr is a possibility. Joseph Parker I see had a good victory over Derek Chisora - that could be a possibility.
"And we're looking at a couple of other names that might be appropriate."
Fury was fought in October when he overcame Deontay Wilder for the second time to retain his WBC title via KO in round 11.
Usyk recently revealed his interest in taking on Canelo Alvarez at 200lbs, as long as he could retain his heavyweight world titles.