Back in October 2019, Mackenzie Dern was matched up with Amanda Ribas for her third UFC fight. After a 7-0 start in MMA, the decorated Brazilian jiu-jitsu practitioner was handed her first taste of defeat at Ribas' hands, dropping a decision in Tampa.

Just over five years later, she can now say that she avenged that loss after submitting Ribas in the main event of UFC Vegas 101.

Ribas worked her way back to the feet late in the first and then had more activity in a quiet second round. Dern, however, brought the action back to the ground in the third frame and locked up a classic, late armbar to score the submission.

In doing so, the elite BJJ artist became the first to ever submit Ribas inside the cage.

Mackenzie Dern Submits Amanda Ribas In Rematch Over Five Years In The Making

Dern, who looks to crack back into the top five of the women's strawweight rankings, has now won two straight and three of her last five bouts.

Ribas, meanwhile, has now lost three of her last five fights.