Mikaela Mayer has hit out at Alycia Baumgardner by saying, “I don’t know what’s wrong with her.”
The American pair fight on October 15 for the chance to unify the WBO, WBC and IBF belts at super featherweight, on the card for the Claressa Shields vs. Savannah Marshall clash.
"It comes with the territory. It's a lot of drama. It's a lot of stuff that normally I would excuse myself from in my everyday life," Mayer told Sky Sports .
"But I understand that this is part of the job and it comes with the territory because this is entertainment. So I embrace it in that sense but I do it for a reason.
"She got the [WBC] belt so I started calling her out. That's it.
"She didn't like it. Some people, I guess, that's how they build themselves up, that's how they hype themselves up. That's what they need to do to believe in themselves.
"That's not me. I'm mostly smiling most of the time. My confidence comes from the work I put in in the gym and in my training camp and my team. The confidence that my team instils in me through hard work and constant correction and adjustments and criticism from my team. That's where my confidence comes from. She just pulls it out of, I don't know.
"She called me a hater but she's the hater. She's just so mad. I don't know what's wrong with 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."