Britain's Anthony Joshua will put his World Boxing Association and International Boxing Federation belts on the line against Joseph Parker on March 31 in Cardiff. "A couple of months ago I heard him say: 'Why should I be anxious about this little kid from New Zealand?'"
Parker's representative David Higgins arrived in the United Kingdom last week to finalise a deal.
Asked how he thought Joshua would respond to the drugs suggestions, Parker said: "I don't know how he will he respond. he may be angry or upset at what we have been saying".
But Joshua is paying little attention to talk of Parker's renowned chin as he will instead attempt to break down the Kiwi with the same sustained body assault that grinded down the resistance of Carlos Takam in October.
"It is a unification heavyweight championship fight".
And Hearn spoke of his relief at getting the deal complete.
"I'm going to smash him up to the body", said Joshua. I just want to challenge and I think there should be one champion. "This is another huge unification fight for Anthony as he continues to make history in the quest to become undisputed world heavyweight champion".
Anthony Joshua is angry at Joseph Parker's pre-fight approach and vows to earn the Kiwi's respect by "whooping him" in Cardiff.
"Eddie has been great to work with from day one", Higgins said.
Parker himself is looking to extend his own undefeated streak, with the WBO Heavyweight champion now 24-0 in his professional career, coming off a successful defence of his Heavyweight championship against Hughie Fury at Manchester Arena in September.
Who've you got, though? He's consistently fought fighters in the world's top 10 and he's beaten them all easily.
Parker won the WBO title in late 2016 in front his home country fans in New Zealand when he defeated Andy Ruiz by majority decision. He won a lopsided decision against Razvan Cojanu in New Zealand on May 6 and then he traveled to Manchester, England, and won a majority decision against mandatory challenger Hughie Fury, the cousin of former world champion Tyson Fury, in his hometown on September 23.
The 29-year-old said his team settled for Parker because negotiations with WBC champion, Deontay Wilder, have proved too hard. "I'm not scared of AJ", said the 26-year-old New Zealander.