Good fight if we're taking Hrgovic from maybe the Zhang fight against Mercer from the Lewis fight. Close decision either way, but I favour Mercer's inside fighting and body work. Any other version of Mercer likely loses though.
Has Mercer ever won a wide UD lol? I'm laughing because I genuinely don't remember him ever doing that, to anyone. I know the Lennox (and to a lesser extent the Holyfield) fight gives him a lot of mileage in these matchups, but my memory recalls Ray either getting come from behind knockouts or struggling in fights he had no business struggling in. I'm not going to cheat and look at Boxrec, I just legit can't recall actually seeing it.