I actually agree with this. Kovalev would find Joe with something big eventually, leading to a mid to late round stoppage. But I'm not yet as sold on Beterbiev as many seem to be, and I think Calzaghe can frustrate him and wear him down, with maybe a few rough spots along the way. :smoke
Why do you dumbies keep bringing up Lacy? Lacy is an exciting fighter but he lost to Jermain Taylor for F sake. Lacy has been ko'd in 2 out of 3 of his last fights. He lost to BJ Flores for crying out loud!
I think Calzaghe would win both fights, primarily by relying on his ability to punch them a lot of times.