According to promoter Eddie Hearn, he is very serious in exploring a doubleheader event in the United States, with Oleksandr Usyk and Callum Smith in separate bouts.

Usyk and Smith were both winners in their respective divisions of the World Boxing Super Series. Usyk cleaned house at cruiserweight for the WBSS crown, while Smith knocked out George Groves to become the WBSS at super middleweight.

At the moment Smith is the WBA super middleweight champion, while Usy holds the WBA, WBO, WBC, IBF titles at at cruiserweight.

Hearn believes a doubleheader, on a May date in Chicago, is a possible scenario.

"I want a doubleheader with Usyk and Smith - the two WBSS winners and the two Ring magazine champions on the same card," Hearn told Sky Sports.

Usyk is expected to leave his current division and plans to make his official debut at heavyweight. Hearn is viewing former world champion Alexander Povetkin the potential opponent for Usyk. As far as Smith, he would make an options defense of his title.

Hearn ruled out the possibility that Smith, at least in his next fight, would make his first defense in his home city of Liverpool.

"Unlikely. He has got the level where we have to pay him substantial money. May in Chicago or June [in New York] are options before coming back and fighting in a big fight," Hearn said.

"Billy Joe Saunders has moved up to super-middle. Also Chris Eubank Jr vs James DeGale - he could fight one of those guys in the autumn."

There is an idea for Smith to make a defense on the undercard to Anthony Joshua-Jarrell Miller on June 1, but Hearn does not appear confident of pulling that off due to financial reasons.

"We'd like him to be on the June 1 card - whether that's possible I don't know," Hearn said.