How many fighters with a lot of mental strength, solid chins, good engines, who were in or around their prime, not drug addicts and not journeymen did privileged A-side fighter Tyson ever beat, let alone KO? "skills, speed, size and power. A combination that Usyk has never seen before." Throw out size. Tyson was 5'10, 71 inch reach and still sub-220 lbs while roided to the gills. Usyk is small compared to a 6'5.5, 82 inch reach, 240-245 lbs behemoth like Joshua, he's big compared to Tyson. Joshua had skills, speed, size and power. Briedis had skills, speed, power and good southpaw pro experience. Tyson had skills, speed and power. Usyk-Briedis was largely contested at middle or long range and from round 6 onwards Usyk was the aggressor. Usyk-Chisora would be a better case study.