Hopkins is a bit long in the tooth, but at this point, age and father time are two different things. If and only if his body catches up to him tonight, it wont be because of his age. If age were case, then it would've happened eons ago. The ages of 32-35 are the granddaddy ages in boxing....Hopkins has surely surpassed that age range.
I saw the weigh-in, and Sergey seemed a bit goofy and bashful during the staredown, while Hopkins kept it simple and solid. I'm not sure if Sergey is a goofy dude by nature (most dudes that pack a punch, are), but he looked a bit out of his league at the weigh-in....or maybe he wasn't used to the big stage. He acted the same way after his last fight, during the Hopkins interview.
I haven't seen Sergey box for a whole fight, but he's been in there with guys that he can demolish, so what's the point? If he stays low (throw low) and move, he'll be okay. Hopkins doesn't throw that many punches during rounds, but the few that he throws counts...in conjunction with his other antics.
I think Hopkins is probably gonna use the first two rounds to let Kovalev know that he's in a fight, take a couple of rounds off, wait for Kovalev to get careless and try to make the most of his work, then capitalize off his mistakes.
Between Kovalev and Stevenson, I believe Hopkins is saving his weapons for the Stevenson fight (if he gets through tonight without losing or creating a "rematch situation"). Stevenson is more mobile and versatile than Kovalev. If Kovalev possesses the same attributes, then we should've seen it loooong before tonight.
Hopkins by a weird TKO