| Men's Singles | |
|---|---|
| 1980 U.S. Clay Court Championships | |
| Champion |
|
| Runner-up |
|
| Final score | 7–5, 6–3 |
Eighth-seed José Luis Clerc claimed the title and first prize money of $28,000 by defeating qualifier Mel Purcell in the final.
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.