1973 Western Championships
| 1973 Cincinnati Open | |
|---|---|
| Date | August 6 – August 12 |
| Edition | 73rd |
| Category | Grand Prix Circuit |
| Draw | 32S / 16D |
| Prize money | $50,000 |
| Surface | Clay / Outdoor |
| Location | Cincinnati, Ohio, USA |
| Venue | Coney Island |
| Champions | |
| Singles | |
 Ilie Năstase | |
| Doubles | |
 John Alexander / Phil Dent | |
The 1973 Cincinnati Open was a tennis tournament played on outdoor clay courts at the Coney Island in Cincinnati, Ohio in the United States that was part of the 1973 Commercial Union Assurance Grand Prix. The tournament was held from August 6 through August 12, 1973. Ilie Năstase won the singles title.
Champions
Men's Singles
Ilie Năstase defeated 
Manuel Orantes 5–7, 6–3, 6–4
Men's Doubles
John Alexander / Phil Dent defeated 
Brian Gottfried / 
Raúl Ramírez 1–6, 7–6, 7–6