Along with Bjorn Borg, Jernberg is the Swede who has won the most titles. He is without doubt the greatest cross country skier Sweden has seen.He had already won the famous Vassalopett race, the longest cross country race in the world. Jernberg won nine Olympic medals between 1956 and 1964, four of which were gold. He was 35 when he won his last race, the 50 kilometres, at the Innsbruck games. He was also World champion four times.