Per Stefan Mikael Simonsson (born 5 January 1960, in Hyltebruk) is a former professional tennis player from Sweden. He enjoyed most of his tennis success while playing singles. During his career, he won 2 doubles titles. He achieved a career-high singles ranking of World No. 49 in 1983 and a career-high doubles ranking of World No. 88 in 1984. He is a brother of fellow tennis player Hans Simonsson. After his career, he coached two top 10 players on the ATP ranking, Magnus Gustafsson and Magnus Larsson.