In one corner stands Aleksei Oleinik, a 58-13-1 heavyweight that’s forced 46 opponents to tap over his 24-year career. In the other, there’s Werdum, who has a better grappling credentials, having captured several jiu-jitsu and ADCC titles before claiming the UFC belt. The Brazilian is 23-8-1 as an MMA fighter with 11 submissions.

