1998 Great American Insurance ATP Championships – Singles
| Singles | |
|---|---|
| 1998 Great American Insurance ATP Championships | |
| Champion | Patrick Rafter |
| Runner-up | Pete Sampras |
| Score | 1–6, 7–6(7–2), 6–4 |
| Draw | 56 |
| Seeds | 16 |
Patrick Rafter defeated the defending champion Pete Sampras in the final, 1–6, 7–6(7–2), 6–4 to win the singles tennis title at the 1998 Cincinnati Masters.