Two highly anticipated title fights sit atop the bill of this week’s UFC 231 event, and the promotion’s popular “Embedded” series returns to get you ready.

UFC 231 takes place Saturday at Scotiabank Arena in Toronto. The main card airs on pay-per-view following prelims on FS1 and UFC Fight Pass.

In the night’s main event, featherweight champion Max Holloway (19-3 MMA, 15-3 UFC) faces undefeated contender Brian Ortega (14-0 MMA, 6-0 UFC) in a showcase of two of the world’s most dynamic young talents. And in the co-main, former muay Thai rivals Valentina Shevchenko (15-3 MMA, 4-2 UFC) and Joanna Jedrzejczyk (14-2 MMA, 9-2 UFC) face off for the UFC’s vacant women’s flyweight title.

The first episode of “UFC 231 Embedded” previews those two contests. Here’s the UFC’s description:

On Episode 1 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, December 8th on Pay-Per-View.

For more on the UFC 231, check out the UFC Rumors section of the site.