Former UFC middleweight king Silva (3-1) marks Paul’s sternest test to date in the boxing ring. The pair will square off in the headliner of a Showtime pay-per-view event Oct. 29 at Desert Diamond Arena in Glendale, Ariz.

Cormier, who competed against Silva in the octagon before, won’t tear down the YouTube star. He thinks Paul (5-0) has earned his stripes, but points to Silva’s win over former WBC middleweight champion Julio Cesar Chavez Jr. as a bigger accomplishment than anything Paul has done in the ring.