UFC Vegas 101 results: How it happened

Mackenzie Dern started 2025 in triumphant fashion, avenging her 2019 loss to Amanda Ribas with a dramatic armbar submission victory at UFC Vegas 101. The event took place at the APEX facility in Las Vegas, Nevada. 

With just four seconds remaining in the third round, Dern (15-5) sealed the win, marking her second consecutive victory after enduring a challenging 2-4 slump between late 2021 and early 2024. The victory ties Dern for second place in all-time submissions in UFC strawweight history (5) and is her first submission win since her 2021 armbar victory over Nina Nunes.

In the co-main event, Santiago Ponzinibbio showcased incredible resilience. After enduring knockdowns in the first round and absorbing significant strikes in the second, he rallied to secure a third-round TKO victory, capping off an exciting night of fights.

UFC VEGAS 101 RESULTS

115 lbs.: Mackenzie Dern vs. Amanda Ribas — Dern def. Ribas via submission , round 3 (4:56) —

170 lbs.: Santiago Ponzinibbio vs. Carlston Harris — Ponzinibbio def. Harris via TKO , round 4 (3:13)

185 lbs.: Cesar Almeida vs. Abdul Razak Alhassan — Almeida def. Alhassan vis KO (left hook), round 1 (4:16)

185 lbs.: Chris Curtis vs. Roman Kopylov — Kopylov def. Curtis via KO, round 3 (4:59)

145 lbs.: Christian Rodriguez vs. Austin Bashi — Rodriguez def. Bashi via unanimous decision (29-28, 29-28, 29-28)

170 lbs.: Punahele Soriano vs. Uros Medic — Soriano def. Medic via TKO, round 1 (0:31)

125 lbs.: Jose Johnson vs. Felipe Bunes — Bunes def. Johnson via submission, round 1 (2:04)

185 lbs.: Marco Tulio vs. Ihor Potieria — Tulio def. Potieria via TKO, round 1 (3:04)

155 lbs.: Thiago Moises vs. Trey Ogden — Moises def. Ogden via unanimous decision (29-28, 29-28, 29-28)

170 lbs.: Preston Parsons vs. Jacobe Smith — Smith def. Parsons via KO, round 1 (1:13)

125 lbs.: Ernesta Kareckaite vs. Nicolle Caliari — Kareckaite def. Caliari via unanimous decision (28-29, 29-28, 29-28)

205 lbs.: Magomed Gadzhiyasulov vs. Bruno Lopes — Lopes def. Gadzhiyasulov (29-28, 29-28, 29-28)

115 lbs.: Fatima Kline vs. Viktoriia Dudakova — Kline def. Dudakova via TKO, round 2 (4:27)

155 lbs.: Nurullo Aliev vs. Joe Solecki — Aliev def. Solecki via unanimous decision (30-27, 29-28, 29-28)