The upcoming heavyweight showdown between IBF, WBA and WBO king Anthony Joshua and Jarrell Miller as been thrown into disarray after the American returned an ‘adverse finding’ in a drug test sample.

Miller is scheduled to face Joshua on June 1st at Madison Square Garden in New York.

Joshua’s trainer Eddie Hearn said he had been informed by the the Voluntary Anti-Doping Association (Vada) about the finding from a sample collected on 20 March.

“We are working with all relevant parties and will update with more details soon,” he said on Twitter.

Miller’s promoter, Dmitriy Salita, said: “We are in the process of obtaining further information about Vada’s finding and will have more to say soon on this developing situation. In the meantime Jarrell continues to train for his 1 June fight against Anthony Joshua.”

Joshua’s manager Freddie Cunningham said they “will 100% be looking at replacement options” if Miller is not allowed to fight.

Joseph Parker, who Joshua beat on points in Cardiff last year said on Twitter he was “very ready and willing” to step in if given another chance.

Updates to Follow….