Oporto 1991 ATP
Final
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Thomas Muster | m. | Horst Skoff | 6-2 6-7(2) 6-4 |
Semifinal
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Horst Skoff | m. | Eduardo Masso | 6-4 6-4 |
| Thomas Muster | m. | Carlos Costa | 6-7(4) 6-1 6-3 |
Perempat final
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Horst Skoff | m. | Gabriel Markus | 6-1 6-7(2) 6-2 |
| Eduardo Masso | m. | Magnus Larsson | 6-3 4-6 6-1 |
| Carlos Costa | m. | Jimmy Arias | 6-4 6-1 |
| Thomas Muster | m. | Fabrice Santoro | 6-7(4) 6-1 6-1 |
Babak 16 besar
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Horst Skoff | m. | Bart Wuyts | 6-3 5-7 6-1 |
| Gabriel Markus | m. | Renzo Furlan | 2-6 7-6(6) 6-2 |
| Eduardo Masso | m. | Javier Sanchez | 6-3 7-6(4) |
| Magnus Larsson | m. | Lars Jonsson | 3-6 6-3 7-6(2) |
| Carlos Costa | m. | Richard Fromberg | 6-3 5-7 6-4 |
| Jimmy Arias | m. | Andres Vysand | 6-4 6-2 |
| Fabrice Santoro | m. | Francisco Roig | 7-5 6-2 |
| Thomas Muster | m. | Thierry Champion | 4-6 6-3 6-2 |
Babak 32 besar
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Horst Skoff | m. | Cedric Pioline | 6-4 6-2 |
| Bart Wuyts | m. | Andrei Medvedev | 6-0 4-6 6-3 |
| Gabriel Markus | m. | Carl Uwe Steeb | 6-1 4-2 RET |
| Renzo Furlan | m. | Udo Riglewski | 7-6(2) 6-2 |
| Eduardo Masso | m. | Jordi Arrese | 6-2 5-7 6-1 |
| Javier Sanchez | m. | Claudio Pistolesi | 7-6(7) 2-6 6-4 |
| Lars Jonsson | m. | Stefano Pescosolido | 4-6 2-0 RET |
| Magnus Larsson | m. | Silvio Moine | 6-1 6-4 |
| Richard Fromberg | m. | Andrea Gaudenzi | 3-6 6-3 6-3 |
| Carlos Costa | m. | Roberto Azar | 6-3 6-4 |
| Jimmy Arias | m. | Nuno Marques | 3-6 6-1 6-4 |
| Andres Vysand | m. | Mark Koevermans | 6-2 6-3 |
| Fabrice Santoro | m. | Aki Rahunen | 6-3 6-2 |
| Francisco Roig | m. | Franco Davin | 1-6 6-1 6-1 |
| Thomas Muster | m. | Pedro Rebolledo | 1-6 6-4 6-0 |
| Thierry Champion | m. | Omar Camporese | 4-6 6-4 6-3 |