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Mayra Bueno Silva submitted former UFC champion Holly Holm with a rear-naked choke in the first round of their fight at UFC Vegas 77 on Saturday night.

The win was a major upset for Silva, who was a +500 underdog going into the fight.

Holm, who is a former UFC bantamweight champion, had not lost a fight since 2015.

The loss snapped Holm's five-fight winning streak.

Silva is now 13-2-1 in her MMA career.

Holm is now 14-6 in her MMA career.

Here are some additional details from the article:

The fight took place at the UFC Apex in Las Vegas, Nevada.

Silva controlled the fight from the start, taking Holm down and landing ground-and-pound.

Holm tried to get back to her feet, but Silva was able to maintain control and eventually sink in the rear-naked choke.

The fight was stopped at 3:19 of the first round.

Silva's win was a major upset and will likely put her in the title conversation at 145 pounds.