In 1979, Antuofermo became World Middleweight Champion by beating defending champion Hugo Corro by a decision in 15 rounds at Monte Carlo. According to an article in "The Ring", Howard Cosell, who was working on that fight's live broadcast to the USA, was telling viewers that Corro was, in his opinion, way ahead on the judges' cards. When someone on the American television crew found out it was Antuofermo who was actually leading on the cards, Cosell then began to say he had Antuofermo ahead. All three judges' scorecards were very close, each showing a tight, one-point margin: 143–142, and 146–145 in Antuofermo's favor and 146–145 in Corro's favor.