Not only did Dern (16-5 MMA, 11-5 UFC) pull off her first stoppage since April 2021, she avenged a prior loss to Ribas (12-7 MMA, 7-6 UFC) and solidified herself as a potential title challenger. Dern submitted Ribas with an armbar at 4:56 of Round 3 at the UFC Apex in Las Vegas.

UFC strawweight Mackenzie Dern defeated Amanda Ribas via armbar with just four seconds remaining in the third round in the headliner of UFC's first event of 2025 on Saturday in Las Vegas.

Mackenzie Dern vs. Amanda Ribas 2. The night's prelims saw six fighters score the first wins of their UFC careers to go along with de