Amanda Nunes has retired after defending her world bantamweight belt against Irene Aldana at UFC 289 in Vancouver.

The Brazilian, who also held the featherweight title, won on a unanimous points decision at Rogers Arena and after placing her belts on the canvas, announced she was calling time on her career.

She said in her octagon interview:  “Double champion forever, today is a perfect night to retire.

“My mum has been watching me do this for so long, she cannot take it anymore. So I decided, I am still young to enjoy everything I make.

“I never worked out in my mind that I would become a champion and when I did it was unbelievable.”

Nunes, 35, dominated the octagon over a lengthy career, and is the first woman to become a champion in two divisions. She is the only fighter to defend two titles while holding them both.

Saturday’s bout was supposed to be against Julianna Pena but the former champion withdrew due to injury.

Nunes’ victory over Aldana means she walks away with a 23-5 record and is widely regarded as the greatest ever women’s mixed martial artist.

Amanda Nunes completely dominated in her bantamweight championship rematch against Julianna Pena at UFC 277 on Saturday, reclaiming the title she lost back in December.

Nunes, 34, was considered arguably the most dominant woman in the history of mixed martial arts heading into that December showdown, which resulted in a shock upset loss – her first defeat since 2015.

The Brazilian appeared slow and off her game that night, but any hopes from Pena's camp that it would be a similar showing the second time around were dispelled early.

Nunes dominated from the first bell to the last, with three clean knockdowns in the second round alone as it appeared a knockout finish was inevitable.

To Pena's credit, the champion did not have an ounce of quit in her, somehow surviving the entire 25 minutes to lose in emphatic fashion on the judges' scorecards 50-45, 50-44 and 50-43.

Earlier in the night in the co-main event, Mexico's Brandon Moreno won the interim flyweight title with a third-round body-shot knockout against New Zealand's Kai Kara-France in the Fight of the Night.

The first two rounds were closely contested, with Kara-France favouring a leg-kick heavy attack while Moreno was landing the cleaner shots to the head.

All three judges disagreed on how to score the first two rounds, with one judge having it Moreno 2-0, another with Kara-France 2-0 and the third had things tied at 1-1.

But the judges were not needed after Moreno connected with a body kick in the third, digging his toes into the stomach of Kara-France, dropping him before finishing the fight with ground-and-pound.

With the win, Moreno has earned another shot at Deiveson Figueiredo. The pair have fought three times for the title to this point, with a draw in the first contest, followed by a Moreno win, before Figueiredo won the third bout.

'Moreno v Figuiredo IV' promises to be one of the most anticipated fights of the year, with two of their previous three contests winning Fight of the Night on their respective cards.