On episode one of UFC 231 Embedded, flyweight title contender Valentina Shevchenko prepares in Las Vegas, where her sister and training partner Antonina makes her Octagon debut.

Former strawweight champion Joanna Jedrzejczyk trains hard for her new weight class, then braves the wild animals at a nature preserve. Featherweight champion Max Holloway maximizes the rare chance to play in snow.

Title challenger Brian Ortega wraps up his camp with an emotional session and a taco dinner at his home gym.

UFC 231 Embedded is an all-access, behind-the-scenes video blog leading up to the two world title fights taking place Saturday.

UFC 231: Holloway vs. Ortega Fight Card

MAIN CARD (PPV/10 p.m. ET)

UFC Featherweight Championship
Max Holloway (c) vs. Brian Ortega

Vacant UFC Female Flyweight Championship
Valentina Shevchenko vs. Joanna Jedrzejczyk

Welterweight: Gunnar Nelson vs. Alex Oliveira

Featherweight: Hakeem Dawodu vs. Kyle Bochniak

Light Heavyweight: Jimi Manuwa vs. Thiago Santos

PRELIMINARY CARD (FOX Sports 1/8 p.m. ET)

Strawweight: Claudia Gadelha vs. Nina Ansaroff

Female Flyweight: Katlyn Chookagian vs. Jessica Eye

Middleweight: Elias Theodorou vs. Eryk Anders

Lightweight: Olivier Aubin-Mercier vs. Gilbert Burns

PRELIMINARY CARD (UFC Fight Pass/6 p.m. ET)

Light Heavyweight: Devin Clark vs. Aleksandar Rakic

Bantamweight: Brad Katona vs. Matthew Lopez

Welterweight: Chad Laprise vs. Dhiego Lima

Lightweight: Jesse Ronson vs. Carlos Diego Ferreira