Rudy Hartono
Johnsson won men's singles at the first European Badminton Championships in 1968. He eventually won three singles titles at this biennial event (1968, 1970 and 1974), a total bested only by Peter Gade in the early 2000s. He reached the semifinals of men's singles at the All-England Championships on four occasions and was one of only a very few players to beat Rudy Hartono in tournament play during Hartono's prime (semifinals of 1973 German Open). Johnsson was a member of six consecutive Swedish Thomas Cup teams between 1963 and 1979.