Ruiz, an American, had insisted that the rematch take place back in the U.S. or at a neutral venue. Diriyah is a town on the outskirts of Riyadh, the Saudi Arabian capital. Their rematch will be the highest-profile boxing event to be held in the country after welterweight Amir Khan's win over Australia's Billy Dib in Jeddah on July 12.
Saudi Arabia also hosted the World Boxing Super Series super middleweight final between British fighters Callum Smith and George Groves last year.
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