Guaruja 1981 ATP
Final
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Carlos Kirmayr | m. | Ricardo Cano | 6-4 6-2 |
Semifinal
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Ricardo Cano | m. | Kjell Johansson | 6-4 6-4 |
| Carlos Kirmayr | m. | Ilie Nastase | 6-4 6-3 |
Perempat final
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Ilie Nastase | m. | Angel Gimenez | 7-5 7-5 |
| Ricardo Cano | m. | Eric Deblicker | 4-6 6-2 6-4 |
| Kjell Johansson | m. | Bill Scanlon | 7-5 6-3 |
| Carlos Kirmayr | m. | Eddie Dibbs | 6-3 6-3 |
Babak 16 besar
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Ilie Nastase | m. | Rick Fagel | 6-1 3-6 6-1 |
| Kjell Johansson | m. | Paul Kronk | 6-4 7-6 |
| Angel Gimenez | m. | David Carter | 7-6 6-0 |
| Ricardo Cano | m. | Stefan Simonsson | 6-3 6-4 |
| Carlos Kirmayr | m. | Harald Theissen | 6-2 6-1 |
| Eric Deblicker | m. | Victor Pecci | 7-6 6-3 |
| Bill Scanlon | m. | Hank Pfister | 6-2 0-1 RET |
| Eddie Dibbs | m. | Guillermo Aubone | 6-3 6-4 |
Babak 32 besar
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Harald Theissen | m. | Jairo Velasco | 6-4 2-6 6-4 |
| Stefan Simonsson | m. | Diego Perez | 6-1 1-0 RET |
| Hank Pfister | m. | Jose Lopez Maeso | 6-3 3-6 6-0 |
| Ilie Nastase | m. | Ney Keller | 7-5 6-2 |
| Paul Kronk | m. | Gabriel Urpi | 6-0 6-2 |
| Angel Gimenez | m. | Howard Schoenfield | 6-0 6-0 |
| Eric Deblicker | m. | Pablo Arraya | 7-5 6-4 |
| Guillermo Aubone | m. | Roger Guedes | 6-3 7-6 |
| Carlos Kirmayr | m. | Christophe Freyss | 6-2 6-2 |
| Ricardo Cano | m. | Thomaz Koch | 6-4 6-3 |
| David Carter | m. | Marcos Hocevar | 6-2 4-6 6-1 |
| Kjell Johansson | m. | Mario Martinez | 6-2 6-1 |
| Victor Pecci | m. | Steve Meister | 6-3 1-6 6-4 |
| Rick Fagel | m. | Jose Higueras | 6-4 6-4 |
| Bill Scanlon | m. | Joao Soares | 6-2 6-0 |
| Eddie Dibbs | m. | Fernando Maynetto | 7-5 6-3 |