WBC heavyweight champion Deontay Wilder says he will beat Anthony Joshua in his "safe haven" of Great Britain.
Wilder, 32, defended his belt against Bermane Stiverne on Saturday, a week after Joshua retained the WBA and IBF crowns against Carlos Takam in Cardiff.
"Packing out stadiums looks good but the money and Mecca of boxing is in America," Wilder told BBC Sport.
"But if you want to stay at home like a little girl, this king has no problem travelling to knock out the champion."
In an interview with BBC Radio 5 live Breakfast, Wilder accused promoter Eddie Hearn of "brainwashing" British fans with "rumours" that Joshua is the best heavyweight in the world.
"I think Eddie is ducking me more so than Joshua," Wilder added. "If Joshua's a strong champion, a true champion, you guys in England should smoke him out, make him fight. You should see if he's the best.
"My heart says I'm the best, if I'm not I want someone to show me."
'I will only fight a peasant if the king is behind him'
In 2015, Stiverne became the only man to take Wilder 12 rounds, but succumbed within just one at New York's Barclays Center on Saturday.
The win took Wilder's unbeaten record to 38 knockouts from 39 bouts in a professional career which began after he claimed a bronze medal at the 2008 Olympic Games.
Hearn argues that Wilder's relatively insignificant profile in Britain would require him to be realistic in any negotiations for a Joshua fight and has called on him to first face Dillian Whyte in London in February.
Wilder, who says he will compete for 10 more years in order to achieve his "mission" of unifying the heavyweight division, called Whyte a "B-level fighter".
He added: "He's Eddie Hearn's dirty rag in his pocket or his spare tyre on his car. He's a gatekeeper at best. If Dillian is the bridge to Joshua, make sure Joshua is at the end of that bridge.
"All Eddie has to do is put AJ on that contract. I will only fight a peasant if the king is behind him."
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