The search for Anthony Joshua
's next opponent has been given a deadline of next week as the clock ticks down on his American debut.
Joshua's promoter Eddie Hearn wants to announce Jarrell Miller's replacement as early as Tuesday, with the June 1 fight date only six weeks away.
revealed on Wednesday that their shortlist is made up of Adam Kownacki, Luis Ortiz, Kubrat Pulev, Michael Hunter and Manuel Charr, with the addition in the past 24 hours of unbeaten Colombian Oscar Rivas, who is ranked with all four of the major sanctioning bodies.
Ortiz and Kownacki have publicly distanced themselves from stepping in, though those comments could reasonably be dismissed as a negotiating tactic in light of the huge purse available, with Miller having been in line to pocket up to £4.5m.
Ortiz remains the favoured option as a legitimate contender, with the secondary priority to secure an American or a fighter with profile in the US, which would favour Poland-born New Yorker Kownacki and Hunter, an American.
Miller, who tested positive on March 20 for muscle growth substance GW1516, is waiting on the result of his B sample and retains hope that he can clear his name and fight at Madison Square Garden. At this point, that appears highly unlikely.
He said: 'The facts will prevail and I shall be vindicated. My team and I stand for integrity, decency and honesty and we will fight this with everything we have.
'I am absolutely devastated upon hearing the news my boxing license has been revoked in NY State and I will be vigorously appealing this decision. I have never knowingly taken any banned substance and when I found out the news I was totally shocked.
'This was a voluntarily test that I was very happy to do and these results came just one week after another voluntarily test that I had taken which was completely clean.'