When Anderson Silva and Chael Sonnen box on June 15 in Sao Paulo, Brazil, it will be an exhibition rather than a professional match.

National Boxing Council Brazil president Geyza Caryny informed MMA Fighting of the news Monday.

Caryny, the head of the entity that will oversee the Silva vs. Sonnen main event of Spaten Fight Night, said a winner will be declared, in case of a knockout or if it goes the distance, however it won’t be included on either fighters’ official records.

The match will be contested at a catchweight of 98kg (216 pounds) and both athletes will wear 14-ounce gloves, Caryny confirmed.

Silva is 3-2 as a professional boxer, while Sonnen has never competed in the sport previously.

The two former rivals share 94 combined MMA bouts, with Silva finishing 20 of his opponents by knockout, and Sonnen holding seven knockouts to his credit.

Silva and Sonnen fought twice under the UFC banner, with “The Spider” defending his middleweight belt twice via stoppage.

Silva vs. Sonnen 1 is set to be inducted into the UFC Hall of Fame in June.

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