Mikaela Mayer kicked out at Alycia Baumgardner as tensions spilled over for the ultimate time earlier than the ladies get within the ring.
The IBF and WBO super-featherweight world champion reacted after the weigh-in for her unification struggle towards her compatriot, who holds the WBC belt.
The pair have sniped at one another all through the build-up to Saturday’s struggle, which acts because the chief help to Claressa Shields vs Savannah Marshall at The O2.
The winner will instantly rocket up the pound-for-pound rankings, possible closing in on a top-three place, whereas additionally positioning them to step up in weight for a mega struggle towards Katie Taylor.
Tensions have simmered all through with Baumgardner goading the Olympian for being “spoilt” and “entitled” given her standing as a Top Rank fighter.
Both fighters made weight at 9st 3lbs 5oz earlier than Baumgardner appeared to push Mayer, prompting a feisty response.
“I didn’t have any arms because I had three belts, so I used my leg,” Mayer instructed Sky Sports. “All this talk about struggling to make weight is a reflection of what’s going on with this girl.
“She spends too much time in the weight room, she’s struggling. She has to knock me out, she knows that, it’s the only way she’s going to win.
“I’m going to out-box her, she thinks she’s a good boxer but she’s never been in there with somebody like me.”