Giovanni "Nino" Benvenuti is an Italian former professional boxer and actor. He held world titles in two weight classes, having held the undisputed super-welterweight championship from June 1965 to June 1966 and the undisputed middleweight championship twice, from April to September 1967, and from March 1968 to November 1970. As an amateur welterweight boxer he won the Italian title in 1956–60, the European title in 1957 and 1959, and an Olympic gold medal in 1960, receiving the Val Barker trophy for boxing style. In 1961, having an amateur record of 120-0, he turned professional and won world titles in the light-middleweight division and twice in the middleweight division. Near the end of his boxing career he appeared in two Italian films, Sundance and the Kid (1969) and then in Mark Shoots First (1975).

In boxing, the undisputed champion of a weight class is the boxer who simultaneously holds world titles from all recognized major organisations by each other and the International Boxing Hall of Fame. There are currently four major sanctioning bodies: WBA, WBC, IBF and WBO. There were many undisputed champions before the number of major sanctioning bodies recognizing each other increased to four in 2007, but there have only been 19 boxers to hold all four titles simultaneously.