Who you got? Chuvalo, one of the most durable in history, great stamina too, not just a catcher, six feet flat by Boxrec, 71" reach and probably 10-15lbs lighter than Povetkin on the night prime-for-prime. Povetkin is 6'2 with a 75" reach, bit heavier, brings strong pressure with some technical surety. What's the outcome here, how and why?
Povetkin wins. By the way, Sasha has 71'' reach, too (though he's listed now as 75", that's incorrect). In the Takam weigh-in there was a big difference between length of arms (and Takam has 76" reach).
Povetkin comfortably if he's in fighting shape, mentally and physically. Limited brawling types have troubled an unprepared Sashsa before.