Kayla Harrison (19-1 MMA, 3-0 UFC) was the most heavily favored title challenger in UFC history at nearly 8-1, and she showed why when she took apart women’s bantamweight champion Julianna Peña (13-6 MMA, 8-4 UFC) with ease for a second-round submission. The two-time Olympic champion brought Amanda Nunes out of retirement for a superfight.

Kayla Harrison and Merab Dvalishvili put on a pair of standout performances to win their championship bouts Saturday at UFC 316. In the main event of the evening, men’s bantamweight champion Merab Dvalishvili submitted Sean O’Malley to score a second victory over his rival,

Check out the top social media reactions to Kayla Harrison's title victory over Julianna Peña in the UFC 316 co-main event.