You’d have to try very hard to convince me and a lot of people Bivol is anywhere near as a good as the immortal Billy Conn.
I was going to say that Dmitri would lose. I mentioned Billy Conn as the LHW Champion. They fell: Conn, Carnera, Baer, Walcott, Schmeling, Braddock, ... Dmitri would also fall.
On the one hand Bivol is really fast and elusive and has light feet. He excels at controlling range and Louis has somewhat heavy feet. On the other hand Louis combines firepower with handspeed which is a crappy combination to face for the speedsters. Louis' chin was so-so but that's not going to be a factor since I don't believe Bivol hits hard enough to bother him. This could be one of those fights where Bivol does surprisingly well until he's being woken up on the canvas by the docs.
For 7-8 rounds, yes. But then he gets caught and stopped. Beterbiev staggered him multiple times but was very cautious (too cautious) in pulling the trigger. Louis only needs to stagger him once. And once he does, he will unload a 6 punch combination with the speed that Beterbiev couldn't even dream of. Louis ko 10.