The Brit has delayed the unification bout for the second time, due to injury.
A freak sparring accident to the Brit has forced a postponement to May.
Kiwi David Nyika was scheduled to meet an unconfirmed opponent on the undercard.
David Nyika will have a golden chance to showcase his wares in Riyadh next month.
Victory would put him in line for another shot at his old WBO world title.
The rivals will face off on the undercard of Anthony Joshua v Francis Ngannou at Riyadh in March.
Filip Hrgovic insists he's ready to take on the surging Kiwi heavyweight on March's Joshua-Ngannou undercard.
The Kiwi has outlined he wants to fight again in March, but is yet to find an opponent.
The Brit and the Cameroonian will reportedly lock horns in Saudi Arabia in March.