Hansen competed for Denmark at the 1968 Summer Olympics in the welterweight division but lost his first match.
Hansen fought for the WBC world light welterweight title in 1973, but was stopped by Italian Bruno Arcari.
Hansen won the European title for the third time when he knocked out British European champion Dave Boy Green in the third round.
[2] His fought his last fight in December 1982 winning a decision against former world champion Perico Fernandez.
[2] The 2017 Danish film, Den Bedste Mand, (Pound for Pound) is based on Hansen's and friend Ayub Kalule's lives.