1979 Gray International Open
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| 1979 Gray International Open | |
|---|---|
| Date | August 13–19[a] |
| Edition | 5th |
| Category | Grand Prix |
| Draw | 32S / 16D |
| Prize money | $50,000 |
| Surface | Hard / outdoor |
| Location | Cleveland, Ohio, U.S. |
| Venue | Harold T. Clark Tennis Stadium |
| Champions | |
| Singles | |
 Stan Smith[2] | |
| Doubles | |
| Stan Smith / Robert Lutz[3] | |
The 1979 Gray International Open, also known as the Cleveland Grand Prix, was a men's tennis tournament held on outdoor hard courts at the Harold T. Clark Tennis Stadium in Cleveland, Ohio in the United States that was part of the 1979 Grand Prix circuit. It was the fifth edition of the tournament and was held from August 13 through August 19, 1979.[a] Second-seeded Stan Smith won the singles title and earned $10,000 first-prize money.[4][5]
Singles
Stan Smith defeated 
Ilie Năstase 6–3, 6–4
- It was Smith' 1st singles title of the year and the 52nd of his career in the Open Era.
Doubles
Stan Smith / Robert Lutz defeated 
Francisco González / Fred McNair 6–3, 6–4