Saad’s pressure with no head movement laterally would be lined up for that right of the bigger Johannson, and Saad would be KO’d at some point.
The first time fighting him he seemed to surprise people with that right like Machen and Patterson both better fighters then him. So I’m going to say he drops Toonder on Saad or Matt and takes him out. In a rematch I say Saad whethers the early bombs and stops him late.