| 1971 Cincinnati Open | |
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| Date | August 2 – August 8 |
| Edition | 71st |
| Category | Grand Prix Circuit |
| Draw | 64S / 32D |
| Prize money | $30,000 |
| Surface | Clay / Outdoor |
| Location | Cincinnati, Ohio, United States |
| Venue | Coney Island |
| Champions | |
| Men's Singles | |
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| Women's Singles | |
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| Men's Doubles | |
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| Women's Doubles | |
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The 1971 Cincinnati Open, also known as the Western Open Championships, was a combined men's and women's tennis tournament played on outdoor clay courts at the Coney Island in Cincinnati, Ohio in the United States that was part of the 1971 Pepsi-Cola Grand Prix. The tournament was held from August 2 through August 8, 1971. Stan Smith and Virginia Wade won the singles titles.
Stan Smith defeated
Juan Gisbert, Sr. 7–6, 6–3
Virginia Wade defeated
Linda Tuero 6–3, 6–3