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.

Mackenzie Dern gained redemption against Amanda Ribas, securing a submission victory at the 4:46 mark of the third round at UFC Vegas 101 on Saturday.

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.