Promoter Eddie Hearn had hoped to present the contest at the O2 Arena in London on April 25 as part of an IBF title double alongside the vacant super-middleweight bout between Andre Dirrell and James DeGale, although losing out in the purse bid for the latter has changed all that.
With DeGale likely to have to travel to the US to face Dirrell to earn a $1.5m payday, Hearn has moved quickly to find a new home for the Gradovich-Selby encounter and Tucker stated that May 30 is the date the IBF have down for the fight with the venue staying the same.
Selby has earned his shot at undefeated Gradovich with some impressive performances of late, not least his recent stoppage win over Joel Brunker, and will aim to cement his place among the top performers at 126lbs with a first world title win.
The Welshman faces a tough task though in Russian Gradovich, who is 19-0-1 and has gone from strength to strength since ripping the red belt from Australian Billy Dib in March 2013. The 28 year-old has since beaten Dib again, although last time out could only manage a draw against talented Puerto Rican Jayson Velez.
Confirmation of the new event is yet to be formally confirmed by Matchroom, whilst more details are expected to be released in the next few days.