Natasha Jonas and Lauren Price met each other during the filming of the new edition Gloves are off ahead of their world title unification on March 7.
Jonas and Price will fight for the WBC, IBF and WBA light heavyweight championships at the Royal Albert Hall, live Sky Sports.
Price, an Olympic gold medalist and WBA belt holder, told Jonas directly that she expected to win every round of their contest.
The Welsh star has yet to lose a round in his professional career and is looking to continue that streak in his next fight.
“I believe that,” Price said Sky Sports after that.
She added: “I believe it's my hardest test. It's just another stepping stone. I believe I'm too good and I'm too fast.”
Jonas, however, rejected the proposal.
“It doesn't matter until we get in the ring,” Jonas said. “She says these things all the time. But you put pressure on yourself to support it.
“You're not going to lose a round? Okay, so what happens when the first round goes by and you lose it? What are you going to do then, because you said you're not going to lose a round? What happens then in round two, three, four, five, six ?
“I would expect you to win every round for the opposition she had.”
Jonas insisted that Price's claim actually betrays a lack of confidence.
I think she has to tell herself that in order to believe it. To be like, 'Right, I've got this,'” said the Liverpudlian. “You're trying to convince yourself.
“I just think you're kidding yourself. You're telling yourself, 'I can do that.' That is what I believe she is doing.
“I won't buy it.”