A 160 willie monroe would make canelo look very bad

Monroe style will cause him problems, and it will take Canelo a few rounds to adjust, but Monroe isn't on the level of a Floyd, or a Lara who superior boxer/movers who are not easily baited into a fight. Monroe would most likely start to battle Canelo the way he tried against GGG, and that's when he starts getting countered to the body and the head. Canelo stops Monroe late, I think.