For how many years did British decathlete Daley Thompson go unbeaten in competition?

Francis Morgan Ayodélé Thompson, (born 30 July 1958), known as Daley Thompson, is a British former decathlete. He won the decathlon gold medal at the Olympic Games in 1980 and 1984, and broke the world record for the event four times. He was unbeaten in competition for nine years.

With four world records, two Olympic gold medals, three Commonwealth titles, and wins in the World and European Championships, Thompson is considered by many to be one of the greatest decathletes of all time. Robert Chalmers described him as "the greatest all-round athlete the United Kingdom has ever produced".

At the 1984 Olympic Games Thompson equalled German athlete Jürgen Hingsen's world record. When the new scoring tables were introduced, Thompson became the sole record holder with a recalculated score of 8,847 points, a world record that stood until 1992, when it was surpassed by the American athlete Dan O'Brien with a score of 8,891.