Joseph Parker has taunted Anthony Joshua about his new, leaner physique ahead of the pair's heavyweight unification clash later this month.
The undefeated New Zealander joked that Joshua's plans to shed one stone for the bout are proof that he does not trust his own body.
Parker, who is also aiming to weigh in leaner for the fight, went on to insinuate that the Briton is trying to emulate him.
"If he actually trusts his body he would not be trying to change who he is. He's trying to be leaner, faster. I don't know if he's trying to be him or me," the Daily Mail quotes the Kiwi fighter as saying.
"I'm going to be a lot lighter. In the last fight we were 112kg (17st 18lbs), for this fight 108 (17st).
"Oh yeah, I'll be better. Faster, stronger, better movement, I'll show everyone."
The WBO, WBA and IBF world titles will be on the line when Parker and Joshua meet at Cardiff's Principality Stadium on March 31.