Canelo Álvarez and Caleb Plant got into a heated exchange during their news conference on Tuesday, which was to promote their upcoming super middleweight title unification match.

Plant left the news conference with a cut underneath his right eye.

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The fight broke out after both champions had a verbal exchange during their face-off before the news conference, which was in the garden of the Beverly Hilton. Plant reportedly made a comment about Álvarez’ mother, provoking the Mexican superstar to shove Plant with two hands.

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Plant then stepped forward and tried to throw a left hook at Álvarez, who managed to dodge it and then threw a left hand which connected on Plant’s face. Álvarez hit Plant’s sunglasses, which ultimately caused the cut.

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After the exchange happened, both fighters’ camps ran onto the stage and separated them.

Álvarez (56-1-2, 38 KOs) will risk his WBC, WBA and WBO super middleweight titles against Plant (21-0, 12 KOs), the unbeaten IBF champion, when they meet Nov. 6 at the MGM Grand Garden Arena in Las Vegas.

The Associated Press contributed to this report.