Cincinnati Open 1981
John McEnroe won the title, beating Chris Lewis 6–3 6–4 in the final.
Latest results
- Semifinal: John McEnroe def. Raul Ramirez 7–6 6–1
- Semifinal: Chris Lewis def. Stan Smith 6–7 7–6 6–3
- Quarterfinal: John McEnroe def. Bob Lutz 1–6 6–3 6–2
- Quarterfinal: Raul Ramirez def. Thierry Tulasne 6–1 2–6 6–3
Cincinnati 1981 1981
- Defending champion
- Harold Solomon
Ranking points by round
| Champion | 1,000 |
| Runner-up | 650 |
| Semifinal | 400 |
| Quarterfinal | 200 |
| Round of 16 | 100 |
| Round of 32 | 50 |
| Round of 64 | 30 |
| Round of 128 | 10 |
| Qualifier bonus | 20 |
Recent finals
| Year | Champion | Runner-up |
|---|---|---|
| 1980 | Harold Solomon | Francisco Gonzalez |
| 1979 | Peter Fleming | Roscoe Tanner |
| 1978 | Eddie Dibbs | Raul Ramirez |
| 1977 | Harold Solomon | Mark Cox |
| 1976 | Roscoe Tanner | Eddie Dibbs |
| 1975 | Tom Gorman | Sherwood Stewart |
| 1974 | Marty Riessen | Bob Lutz |
| 1973 | Ilie Nastase | Manuel Orantes |
Matches by round
63 finishedFinal
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Semifinals
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Quarterfinals
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Round of 16
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Round of 32
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Round of 64
32 finishedFin
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