Achievements He won two bronze medals in the individual and team modern pentathlon events. Korhonen won three team medals at the world championships of 1957–1959. His best individual result was fourth place in 1957. Domestically he won the Finnish title in 1954 and 1955, placing second in 1957 and 1962, and third in 1951, 1959, 1961, 1964 and 1967. Korhonen was also a Finnish champion in fencing, swimming and water polo.