Mikaela Mayer believes she has the edge in experience in her upcoming showdown with rival Alycia Baumgardner.
The two have been trading harsh words for months on social media.
They will finally collide on October 15 at the O2 Arena in London, with the WBO, IBF, IBO and WBC super featherweight world titles at stake.
Their showdown will be the co-featured attraction to the undisputed fight between middleweights Claressa Shields and Savannah Marshall.
Mayer is not bothered by the incoming insults and the war of words. She believes Baumgardner is upset because of certain statements that were made about her notoriety.
"I never heard of her as an amateur," Mayer said to Sky Sports. "I'm just saying facts. She thinks she's being disrespected but it's just true. She was never on the national team with me or a training camp when they brought in the number three and four, I'd never heard of her. That's not me hating that's me telling you guys the facts. I'm very surprised that she'd had 165 amateur fights because I'd never heard of her.
"I'm not hating. I say you haven't fought anyone in the pros - look at her [on] Boxrec. The girls that she's knocked out, [most of them] have a losing record. Most of the people on her resume have a losing record. I don't think she's been tested. If that's all the fights she could get, fine, but the point is you haven't been tested the way that I've been tested.
"Again facts, if you don't like the way it sounds I'm sorry, it's just true. You don't have the experience of the opponents that I've had. So it's no disrespect. It's just facts."
