Both boxers go into the bout unbeaten, however Joshua was sent to the canvas against Wladimir Klitschko last year.
"I think Anthony Joshua has a very good chin," Barry said. "He's been hit by some big punches in the Klitshcko fight. We know Wladimir Klitschko is a big powerful guy, had him on the ground but Joshua was about to shake it off and come back and score a spectacular knock out.
"We don't think he has a dodgy chin, but we know he can be knocked down. He was knocked down in amateurs, he's been knocked down in sparring, he was knocked down in the Klitschko fight."
With that in mind, Barry predicted Parker would be able to score a knock out win over the Brit.
However Parker isn't going into the fight looking for a knock out. If the fight goes the distance, then so be it.
"I'm envisioning myself with hand raised at the end and going back to New Zealand with the belts," Parker told Helen Yee Sports.
"I want to make history.
"If a knock out comes, it'll come. But it'll be a great fun."
Despite going into the fight with the underdog tag, Parker was confident and planned to use that label to his advantage in the build up to when the pair finally meet in the ring.
"Everyone's already thinking that we're going to lose the fight so there's no pressure. Our team's just focusing on what we need to do.
"He hasn't seen anything that we're going to bring.
"We know what we can do, we know how good we are, we just have to put it on display."
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