A year after surrendering the title, he challenged the world middleweight champion Emile Griffith, only to be stopped by the American in the ninth round.
Christensen's amateur career featured 100 bouts, including the 1948 London Olympic Games. He turned professional in 1949 and won the Danish title the following year. He fought 55 times before retiring in 1985.
His promoter, Mogens Palle, said Christensen was "not only the best and most elegant boxer that Denmark fostered" after the Second World War, but also had "a calibre and format that we seldom experience today". He leaves a wife and three children.
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