Here is where i favour Frazier. Opetaia has a habit of fading late and getting caught with big shots late. Opetaia has a chance early with his quick hands and terrific two handed power. Problem is he is way too agressive at times. Frazier was nowhere near as easy to hit as people think. Only a guy like Foreman who had enormous physical strength and unreal power could land on him like that. Opetaia is terrific but he isn't a Foreman level puncher. Opetaia may stagger Frazier once or a few times, may even knock him down. But Frazier had a good chin and excellent head movement. We just don't know how Opetaia is going to deal with the brutal left hooks to the body. My guess is Frazier survives an early scare and breaks Opetaia down by body punching. Combine this with Opetaia getting overly agressive at times and fading late in a fight, i see Frazier stopping him late. Opetaia better stop Frazier in 6 rounds. Once it goes past that, Frazier will only get stronger, the body punches will only hurt even more, the left hooks will land with more and more potency. Frazier stops him late IMO. I would be surprised if this went the distance.
Considering how well an old inactive Breidis did down the stretch kind of poured some cold water on my opinion of Opetaia He has done well knocking over over-matched foes but has not really shined vs elite opposition. Sure he has some tools but he is a bit passive and can be outworked and hurt. I think Frazier would rip him
Frazier gotta be really careful with his head movement, Opetaia has some of the best uppercuts around.