Tyson Fury and Deontay Wilder “owe it to the fans” to make a rematch happen, says WBC president Mauricio Sulaiman.
Although a deal is yet to be agreed, Sulaiman said he was “confident” the fight would take place.
WBC world champion Wilder and Fury, as well as unified world heavyweight champion Anthony Joshua, are signed to rival US broadcasters, which could make future negotiations more difficult.
A rematch between American Wilder and Britain’s Fury has been anticipated since a first meeting in December in which Wilder retained his belt after an enthralling draw in Los Angeles.
The WBC mandated the rematch but has so far resisted imposing a deadline for purse bids, with both parties saying they are close to an agreement.
It is set to take place in New York on May 18 – marking the beginning of an extraordinary two weeks in the city for British boxing with Anthony Joshua defending his four world titles against Jarrell Miller on June 1.