Canelo Alvarez vs. Floyd Mayweather | fight Highlights At this point, only the relentless passage of time appears capable of halting the dominance of pound-for-pound king Floyd Mayweather Jr., as no opponent in the ring seems up to the task. In what many considered his toughest challenge in years, Mayweather delivered a masterclass performance against Saul "Canelo" Alvarez, winning a majority decision to unify the junior middleweight world titles on Saturday night. The bout took place during Mex