1989 Monte Carlo Open – Singles

Alberto Mancini won in the final 7–5, 2–6, 7–6, 7–5 against Boris Becker.

Ivan Lendl was the defending champion but did not compete this year.

Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. All sixteen seeds received a bye to the second round.


 * 1) 🇸🇪 Mats Wilander (semifinals)
 * 2)  Boris Becker (final)
 * 3) 🇸🇪 Kent Carlsson (withdrew)
 * 4)  Jakob Hlasek (second round)
 * 5) 🇺🇸 Jimmy Connors (second round)
 * 6) 🇫🇷 Henri Leconte (second round, retired)
 * 7) 🇪🇸 Emilio Sánchez (second round)
 * 8) 🇦🇷 Guillermo Pérez Roldán (quarterfinals)
 * 9) 🇸🇪 Jonas Svensson (third round)
 * 10)  Ronald Agénor (quarterfinals)
 * 11)  Slobodan Živojinović (second round)
 * 12)  Andrei Chesnokov (second round)
 * 13) 🇦🇹 Horst Skoff (semifinals)
 * 14) 🇦🇷 Alberto Mancini (champion)
 * 15) 🇦🇺 Mark Woodforde (second round)
 * 16) 🇪🇸 Jordi Arrese (third round)