Anthony Joshua has been warned he faces a formidable test when he takes on Jarrell Miller in New York on June 1.

Former world heavyweight champion David Haye describes the 22½ stone American as a “tank” and a “monster”.

Joshua, holder of the WBA, IBF, WBO and IBO belts, and Miller were due to come face to face at a press conference in Manhattan today ahead of their clash at Madison Square Garden.

Haye, who reigned as WBA champion between 2009 and 2011, says former kickboxer Miller, who is undefeated in 24 fights, winning 20 by knockout, will pose more problems than his critics anticipate.

Joshua’s promoter Eddie Hearn turned to Miller after it appeared WBC champion Deontay Wilder and Tyson Fury were heading for a rematch following their thrilling draw in Los Angeles in December.

But that fight is now in doubt after Fury signed a new £80million contract with ESPN which means his next five fights will be shown on that network while Wilder is tied to rivals Showtime.

However Shelley Finkel, Wilder’s adviser, said he hopes the two rival broadcasters could collaborate on a deal to make the contest happen.