Vieira vs Chiasson

Who won Vieira vs Chiasson?

Ketlen Vieira beat Macy Chiasson by unanimous decision in their 3 round contest during the main card of UFC Fight Night, on Saturday 31st May 2025 at UFC Apex in Las Vegas.

The scorecards were announced as 29-28, 29-28, 30-27 in favor of the winner Ketlen Vieira.

The fight was scheduled to take place over 3 rounds in the Women’s Bantamweight division, which meant the weight limit was 135 pounds (9.6 stone or 61.2 KG).

Vieira vs Chiasson stats

Ketlen Vieira stepped into the octagon with a record of 14 wins, 4 losses and 0 draws, 2 of those wins coming by the way of knock out and 4 by submission.

Macy Chiasson made her way to the cage with a record of 10 wins, 3 losses and 0 draws, 3 of those wins coming by knock out and 3 by submission.

This was Ketlen Vieira's 13th fight in the UFC, having made her debut for the promotion in 2016. Macy Chiasson marked her 12th fight for them, having made her own debut for the promotion in 2018.

Ketlen Vieira's UFC record stood at 9-4-0, while Macy Chiasson's came in at 8-4-0.

The stats suggested Chiasson had an advantage in power over Vieira, with a 30% knock out percentage over Vieira's 14%.

If the fight went to the ground, their records suggested Chiasson had a slight advantage over Vieira, with a 30% submission rate over Vieira's 29%.

Ketlen Vieira was the same age as Macy Chiasson, at 33 years old.

Chiasson had a height advantage of 3 inches over Vieira. That also extended to a 4-inch reach advantage.

Vieira was the more experienced professional fighter, having had 5 more fights, and made her debut in 2014, 3 years earlier than Chiasson, whose first professional fight was in 2017. She had fought 16 more professional rounds, 50 to Chiasson's 34.

Vieira vs Chiasson form

Ketlen Vieira had beaten 3 of her last 5 opponents.

In her last fight before this contest, she had lost to Kayla Harrison at UFC 307 on 5th October 2024 by unanimous decision in their 3 round contest at Vivint Arena, Salt Lake City, United States.

Previous to that, she had won against Pannie Kianzad at UFC Fight Night London – Aspinall vs. Tybura on 22nd July 2023 by unanimous decision in their 3 round contest at O2 Arena, London, United Kingdom.

Going into that contest, she had been beaten by Raquel Pennington at UFC Fight Night: Gastelum vs. Imavov on 14th January 2023 by split decision in their 3 round contest in the United States.

Before that, she had beaten Holly Holm at UFC Fight Night: Holm vs. Vieira on 21st May 2022 by split decision in their 5 round contest at UFC APEX, Las Vegas.

She had defeated Miesha Tate at UFC Vegas 43 on 20th November 2021 by unanimous decision in their 5 round contest at UFC APEX, Las Vegas.

Chiasson had beaten 3 of her last 5 opponents, stopping 1 of them, going the distance twice.

In her last fight leading up to this contest, she was victorious against Mayra Bueno Silva at UFC 303 on 29th June 2024 by knockout in the 2nd round at T-Mobile Arena, Las Vegas, United States.

Previous to that, she had won against Pannie Kianzad at UFC Fight Night: Tuivasa vs. Tybura on 16th March 2024 by submission in the 1st round at UFC Apex, Las Vegas.

Going into that contest, she had been defeated by Irene Aldana at UFC 279 on 10th September 2022 by knockout in the 3rd round at T-Mobile Arena, Las Vegas.

Before that, she had beaten Norma Dumont at UFC 274 on 7th May 2022 by split decision in their 3 round contest at Jeunesse Arena, Rio de Janeiro, Brazil.

She had lost to Raquel Pennington at UFC Fight Night on 18th December 2021 by submission in the 2nd round.

Activity check

In of activity leading into the fight, Macy Chiasson had been fighting more than Ketlen Vieira.

Going to this contest, Ketlen Vieira had last fought 8 months and 3 days ago, while Macy Chiasson's last outing had been 11 months and 10 days ago.

Vieira's last 5 fights had come over a period of 3 years, 6 months and 19 days, meaning she had been fighting on average every 8 months and 16 days. In those fights, she fought a total of 19 rounds, meaning that they had lasted 3.8 rounds on average.

Chiasson's last 5 fights had come over a period of 3 years, 5 months and 21 days, meaning she had been fighting on average every 8 months and 10 days. In those fights, she fought a total of 11 rounds, meaning that they had lasted 2.2 rounds on average.

What time did Vieira vs Chiasson start?

The fighters were expected to walk out at around 1:40 AM UTC , which was 9:40 PM EST or 6:40 PM PST on the West Coast of America, or 2:40 AM BST in the UK.

What were the odds on Vieira vs Chiasson?

Ketlen Vieira was a 6/5 (+120) underdog going into the contest, while Macy Chiasson made her way into the ring at 4/6 (-150) with oddsmakers.