1989 Cincinnati Open – Singles
Introduction Mats Wilander was the defending champion but lost in the semifinals to Stefan Edberg.Brad Gilbert won in the final 6–4, 2–6, 7–6 against Edberg.
Seeds
Draw ===Finals======Top half=======Section 1========Section 2=======Bottom half=======Section 3========Section 4====
References *  1989 Cincinnati Open Draw