Joseph Parker claims he is winning the war of words with Anthony Joshua saying the Brit is rattled.
And Parker has continued his camp's attack on Joshua, claiming he could "crush" Joshua's confidence in their unification fight by standing up to his best punches.
Joshua, the man most rate as the world's top heavyweight, will be a heavy favourite to win in Cardiff on April 1.
WBO heavyweight champion Parker has given another tick to his controversial manager David Higgins, who he says has unsettled Joshua.
Higgins' attacks on Joshua's credentials led to a bizarre response from the WBA and IBF belt holder who has declared it would need "more than a human" to beat him.