Dominic Breazeale dismissed world heavyweight champion Deontay Wilder's comments about death in the ring, at a pre-bout training session in New York on Wednesday.
"I know he said he wanted a body on his record and he wanted to kill me or whatever may be. Let him say all he wants to say, that's like a little chihuahua barking," said Breazeale.
"So come Saturday night man. Man on man, one on one, we're in the room, we've got to square up," he added.
Breazeale (20-0-1, 18KOs) and Wilder (40-1-0, 39KOs), current WBC world title holder, will battle it out at the Brooklyn Center in New York on Saturday night.