Just caught some highlights of this so not got a full view of the fight. But looks like Joe Smith did what he does, and while I thought Alvarez could probably have worked out a game plan to overcome Smith's somewhat primitive style, his dogged determination and clear power ended up working for him and he cleaned Alvarex out.
Seems to be one of those guys that people write off too easy and is better than we give him credit for.
Good win and gives his career another boost.