The Marvin Hagler vs. Roberto Duran (or, alternatively, Marvelous Marvin Hagler vs. Roberto Duran, Roberto Duran vs. Marvin Hagler or Roberto Duran vs. Marvelous Marvin Hagler) contest was a professional boxing fight which took place on November 10, 1983, at the Caesar's Palace hotel in Las Vegas, Nevada. It was for Hagler's universally recognized (or undisputed) IBF, WBA and WBC world Middleweight title.