He is a frontrunner, whose wrestling has regressed and whose striking, while powerful, seems to get less technical as the fight goes on. The blueprint to beat him is there - avoid the early blitz, drag him into deep waters, and then tempt him to brawl (which he won't be able to resist), and then work your own game plan.
It also doesn't help when for a considerable part of your time at the top of the sport, your coach is Hooft, who offers such sound advice as "get up, get up, get up, what are you doing" when his/your gameplan of 1st round KO doesn't work.