The American boxer made this assertion when asked about the possibility of meeting British heavyweight Joshua in the ring.
He was on the show Good Morning Britain alongside Tyson Fury to promote his December 1 fight.
Wilder said he believes the Joshua’s camp don’t really want the fight.
“Hey Joshua, me and Fury are about to get this thing going on, baby,” he said looking down the camera. “We’re about to see who the biggest and the baddest in the world, one champion, one face, one name, something you were too much of a coward to do in your own country.
“You were a coward and you know this, your whole team know this. You said different things over and over. You manipulate, you’re compulsive liars.
“The audience put their hard-earned money into this, this is an emotional sport. Enough is enough. Joshua had a career plan and Deontay Wilder wasn’t in it from the start.”
The WBC king and his promoter have sent proposals for a fight to Anthony Joshua and his teams, but nothing seems to be coming out the discussion.
News Nigeria recalls that the world heavyweight champion Anthony Joshua selected his belts IBF, WBA and WBO by beating Russia’s Alexander Povetkin by a stoppage of the referee on Saturday at Wembley, before perhaps the expected shock against Deontay Wilder in April.