1989 Monte Carlo Open – Singles

Singles
1989 Monte Carlo Open
Champion Alberto Mancini
Runner-up Boris Becker
Score7–5, 2–6, 7–6, 7–5
Draw48 (6Q / 4WC)
Seeds16

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.