Kayla Harrison won a UFC title in only her third fight in the promotion
Kayla Harrison put in a dominant performance as she submitted Julianna Pena to win the bantamweight title at UFC 316 in Newark, New Jersey.
Harrison out-grappled fellow American Pena and controlled the action throughout before finishing the fight with a kimura at the end of the second round.
Victory adds a first UFC championship to her two Olympic judo gold medals and PFL world titles.
In her post-fight interview, Harrison said she almost quit on Thursday after struggling during her weight cut.
The 34-year-olds two PFL titles, in 2021 and 2022, were won at 155lb (11st 1lb) but she has fought at 135lb (9st 9lb) since joining the UFC last year.
"This is for anyone whos ever felt hopeless, whos wanted to quit, whos wanted to give up. On Thursday I wanted to quit, I wanted to give up," said Harrison.
"Im referring to 135lb - only God can get that last pound off me, Im not strong enough. You have to go to a bad place and the only way through is to have surrender and have faith."
After the bout Harrison faced-off with former double champion Amanda Nunes, who confirmed she would be coming out of retirement to challenge for the belt.
The 37-year-old Brazilian, who retired in 2023, is a former training partner of Harrison and is widely considered the greatest womens mixed martial artist of all time.
She is the only woman to become a two-division UFC champion and exited the sport with 23 wins from 28 bouts.
UFC commentator Joe Rogan described a potential match-up with Harrison as "the biggest womens title bout in UFC history".
"Yes definitely. We knew this is going to happen. Now were going to do it," said Nunes.
Harrison said before the bout she was ready to become the "face of womens MMA" and came into the bout with Pena as a big favourite with oddsmakers.
Pena, meanwhile, was making the first defence of her second bantamweight title after beating Raquel Pennington by split decision in October.
Harrisons world-class judo background has been the foundation to her success since transitioning to MMA in 2018 and it was on display as she took Pena down in both rounds.
Harrison controlled the action on the ground in the latter half of the first, Pena being deducted a point for two illegal up-kicks, before securing another takedown in the second.
After Pena avoided an arm triangle, Harrison switched to a kimura with seconds remaining in the round before securing the finish.
Nunes (left) and Harrison were former training partners at gym American Top Team
US president Donald Trump was cageside for UFC 316
Following victory, Harrison dropped to her knees in tears in the centre of the octagon before sharing a prayer with Pena and paying tribute to single mothers.
In 2020, Harrison adopted her niece and nephew when her stepdad, who was looking after the children at the time, died suddenly.
"This is for my family, my two beautiful children I love you unconditionally," said Harrison.
"This is for all the mums, especially the single mums. I know its hard, I know what it feels like to be punished but youre not - youre being positioned. You have a place in those childrens lives."
Merab Dvalishvili has won 13 consecutive fights
In the main event, Georgias Merab Dvalishvili submitted American Sean OMalley in the third round to retain his bantamweight title.
Dvalishvili beat OMalley for the belt last year with a typically relentless display of grappling and mirrored the performance in the rematch.
Although OMalley defended well in the second round, he was taken down early in the third and Dvalishvili never looked back, controlling the action on the ground before securing a north-south choke.
Victory was Dvalishvilis second defence of his belt and extended his winning streak to 13, the second-longest in the UFC among active fighters.
Russias Islam Makhachev holds the longest with 15.
"Im on top of the world. I came from nothing, Im so grateful to inspire so many generations. It doesnt matter what you have if you know where youre going and you have a goal," said Dvalishvili.
On the undercard, former Bellator bantamweight champion Patchy Mix suffered a unanimous decision defeat on his UFC debut by fellow American Mario Bautista.
Mix, who left the PFL in May after venting frustrations over a lack of fights, suffered his second defeat in 22 bouts while Bautista extended his winning streak to eight.
Dvalishvili has beaten former world champions OMalley, Jose Aldo, Petr Yan and Henry Cejudo
Dvalishvili looks set for more rematches having beaten the top contenders