One of boxing's biggest stars returns to the ring on Halloween, as Saul "Canelo" Alvarez challenges Christian Mbilli for the WBC super middleweight championship. Here's everything to know about Saturday's big fight. Alvarez (63-3-2, 39 KOs) returns from a 13-month layoff following his September 2025 unanimous decision loss to Terence Crawford, which ended his second reign as undisputed super middleweight champion.