Saul "Canelo" Alvarez stands in the way of Terence Crawford's bid for boxing history Saturday when they clash in Las Vegas for Alvarez's undisputed super middleweight world title.

Crawford, a four-division champion, is jumping up two weight divisions in a bid to become the first male boxer to become an undisputed champion in three different categories.

Unbeaten with a record of 41-0 with 31 knockouts, Crawford previously claimed all four belts on offer at super lightweight and welterweight.

But the 37-year-old American will step into the ring at Allegiant Stadium, home of the NFL's Las Vegas Raiders, an underdog against Mexican great Alvarez.

Alvarez, who owns a record of 63-2-2 with 39 knockouts, is also a four-division champ and the only fighter to claim a four-belt undisputed title

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