Bivol will get on top and stop Richards middle rounds. But I think Richards might have a few decent'ish rounds before he gets stopped. Firstly because Bivol hasn't fought for 18 months and Richards has this weird sort of style, he looks awkward and he has nothing to lose here, nobody expects a thing. Throw in the fact Bivol hasn't stopped anybody since Barrera in early 2018, since then he has gone the distance 4 times, I know those opponents are levels above Richards but still, Bivol isnt blowing everybody away. Richards might cause a little stir for a few rounds but will will eventually it will get too much.