U.S. Men's Clay Court Championships 1981
Guillermo Vilas won the title, beating Sammy Giammalva Jr 6–2 6–4 in the final.
Latest results
- Semifinal: Guillermo Vilas def. Victor Pecci 6–1 6–3
- Semifinal: Sammy Giammalva Jr def. Bruce Manson 6–7 6–4 6–3
- Quarterfinal: Guillermo Vilas def. Jose Higueras 6–3 6–2
- Quarterfinal: Victor Pecci def. Harold Solomon 6–3 6–1
Houston 1981 1981
- Defending champion
- Ivan Lendl
Ranking points by round
| Champion | 250 |
| Runner-up | 165 |
| Semifinal | 100 |
| Quarterfinal | 50 |
| Round of 16 | 25 |
| Round of 32 | 0 |
| Qualifier bonus | 13 |
Recent finals
| Year | Champion | Runner-up |
|---|---|---|
| 1980 | Ivan Lendl | Eddie Dibbs |
| 1979 | Jose Higueras | Gene Mayer |
| 1978 | Brian Gottfried | Ilie Nastase |
| 1977 | Adriano Panatta | Vitas Gerulaitis |
| 1976 | Harold Solomon | Ken Rosewall |
| 1975 | Ken Rosewall | Cliff Drysdale |
| 1974 | Rod Laver | Bjorn Borg |
| 1973 | Ken Rosewall | Fred Stolle |
Matches by round
31 finishedFinal
1 finishedFin
Semifinals
2 finishedFin
Fin
Quarterfinals
4 finishedFin
Fin
Fin
Fin
Round of 16
8 finishedFin
Fin
Fin
Fin
Fin
Fin
Fin
Fin
Round of 32
16 finishedFin
Fin
Fin
Fin
Fin
Fin
Fin
Fin
Fin
Fin
Fin
Fin
Fin
Fin
Fin
Fin