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 kicked off 2025 with a heaping helping of revenge. The strawweight jiu-jitsu ace submitted Amanda Ribas with a nasty third-round armbar on Saturday night in the main event of UFC Vegas 101,

The world’s leading MMA promotion recently concluded their first event of the year, UFC Vegas 101. The event lived up to the hype and had a little bit of everything. In the main event, a true showcase for grappling enthusiasts was on display as Mackenzie Dern out-grappled Amanda Ribas and secured a victory.