Mackenzie Dern and Amanda Ribas were on point for the UFC’s first headliner of 2025, but Friday’s official weigh-ins for UFC Vegas 101 were not without complications.
Saturday’s main event between Dern and Ribas is official, with the strawweight contenders both tipping the scale at 116 pounds, making use of the one-pound allowance for a non-title fight. This bout is a rematch of their October 2019 encounter, which Ribas won by unanimous decision.