UAMC Exclusive Clip: Stallone discusses legendary boxer Roberto Durán’s role in Rocky II. Hollywood icon Sylvester Stallone has opened up about his experiences sparring with legendary boxer Roberto Durán during Rocky II and the he realised he had a long way to go if he wanted to match professional fighters. Speaking in an exclusive clip … Continue reading Sylvester Stallone on ‘Rocky II’ Sparring Partner Roberto Duran