The 1989 Grand Prix de Tennis de Lyon – Singles was an event of the 1989 Grand Prix de Tennis de Lyon men's tennis tournament that was played at the Palais des Sports de Gerland in Lyon, France from 20 February until 27 February 1989. The draw comprised 32 players and eight were seeded. Unseeded Yahiya Doumbia was the defending champion but lost in the first round to Jakob Hlasek. Second-seeded John McEnroe won the singles title, defeating first-seeded Jakob Hlasek, in the final, 6–3, 7–6.[1]
John McEnroe (champion)
Henri Leconte (quarterfinals)
Jonas Svensson (semifinals) Anders Järryd (semifinals) Magnus Gustafsson (quarterfinals) Guy Forget (second round)