LAS VEGAS:

Terence Crawford stunned Mexican superstar to claim the undisputed super middleweight world boxing crown on Saturday, becoming the first man to win undisputed titles in three weight divisions.

In a fight of razor-thin margins, Crawford poured it on in the closing rounds to earn a unanimous decision victory, improving his unblemished record to 42-0 with 31 knockouts.

, 37, had jumped up two weight categories to vie for history, having already counted undisputed titles at super lightweight and welterweight among his titles in four -- now five -- weight classes.

He silenced critics who claimed his sparkling resume was packed with substandard opponents and quieted a raucously pro-Alvarez crowd of 70,482 at Allegiant Stadium, home of the NFL's Las Vegas Raiders.

"For sure this i

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