Andy Lee will make the first defence of his WBO middleweight title against former champion Peter Quillin.
After Lee stopped Matt Korobov in December, it was expected that the Irishman would face Billy Joe Saunders after the European champion had defeated Chris Eubank Jr to become mandatory challenger.
However, after Saunders revealed on Twitter that he had accepted a "six-figure" fee to step aside, the bout between Lee and Quillin is expected to go ahead in New York on April 11.
Saunders, who will face the winner of that encounter in the summer, could feature on the undercard.