# 1991 Philips Austrian Open – Singles

Horacio de la Peña was the defending champion, but lost in the third round to Francisco Clavet.
Karel Nováček won the title by defeating Magnus Gustafsson 7–6$^{(7–2)}$, 7–6$^{(7–4)}$, 6–2 in the final.

## Seeds

All seeds received a bye to the second round.
* Sergi Bruguera (second round)
* Emilio Sánchez (quarterfinals)
* Karel Nováček (champion)
* Magnus Gustafsson (final)
* Horst Skoff (quarterfinals)
* Alberto Mancini (third round)
* Francisco Clavet (semifinals)
* Martín Jaite (semifinals)
* Horacio de la Peña (third round)
* Christian Bergström (third round)
* Javier Sánchez (third round)
* Thierry Champion (quarterfinals)
* Marián Vajda (third round)
* Thomas Muster (third round)
* Marcelo Filippini (second round)
* Cédric Pioline (second round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final | Final | |
| Q | Markus Zillner | 2 | 3 | | | | | | | | | | | | | |
| 7 | Francisco Clavet | 6 | 6 | | | | | | | | | | | | | |
| 7 | Francisco Clavet | 6 | 6 | | 7 | Francisco Clavet | 3 | 7$^7$ | 2 | | | | | | | |
| | | | | | 3 | Karel Nováček | 6 | 6$^2$ | 6 | | | | | | | |
| 3 | Karel Nováček | 7 | 0 | 7 | 3 | Karel Nováček | 6 | 6$^2$ | 6 | | | | | | | |
| 5 | Horst Skoff | 5 | 6 | 5 | | | | | | | | | | | | |
| 5 | Horst Skoff | 5 | 6 | 5 | | | | | | 3 | Karel Nováček | 7$^7$ | 7$^7$ | 6 | | |
| | | | | | | | | | | 4 | Magnus Gustafsson | 6$^2$ | 6$^4$ | 2 | | |
| 12 | Thierry Champion | 6 | 3 | 1 | | | | | | | | | | | 4 | Magnus Gustafsson | 6$^2$ | 6$^4$ | 2 |
| 4 | Magnus Gustafsson | 4 | 6 | 6 | | | | | | | | | | | | |
| 4 | Magnus Gustafsson | 4 | 6 | 6 | 4 | Magnus Gustafsson | 6 | 6 | | | | | | | | |
| | | | | | 8 | Martín Jaite | 2 | 2 | | | | | | | | |
| 8 | Martín Jaite | 6 | 3 | 6 | 8 | Martín Jaite | 2 | 2 | | | | | | | | |
| 2 | Emilio Sánchez | 3 | 6 | 3 | | | | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1 | S Bruguera | 3 | 6 | 6 | | | | | | | | | |
| | H Holm | 1 | 4 | | | C Pistolesi | 6 | 2 | 1 | | | | | | | | | |
| | C Pistolesi | 6 | 6 | | | | | | | 1 | S Bruguera | 1 | 6 | 2 | | | | |
| Q | M Zillner | 4 | 6 | 6 | | | | | | Q | M Zillner | 6 | 1 | 6 | | | | |
| Q | W Kowalski | 6 | 4 | 3 | Q | M Zillner | 5 | 6 | 6 | | | | | | | | | |
| | | | | | 15 | M Filippini | 7 | 3 | 3 | | | | | | | | | |
| | | | | | | | | | | | | | | | Q | M Zillner | 2 | 3 |
| | | | | | | | | | | | | | | | 7 | F Clavet | 6 | 6 |
| | | | | | 9 | H de la Peña | 6 | 6 | | | | | | | | | | |
| | P Arraya | 6$^2$ | 3 | | | G López | 3 | 0 | | | | | | | | | | |
| | G López | 7$^7$ | 6 | | | | | | | 9 | H de la Peña | 4 | 2 | | | | | |
| Q | M Geserer | 1 | 5 | | | | | | | 7 | F Clavet | 6 | 6 | | | | | |
| | P Kühnen | 6 | 7 | | | P Kühnen | 6 | 4 | 4 | | | | | | | | | |
| | | | | | 7 | F Clavet | 1 | 6 | 6 | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 3 | K Nováček | 6 | 6 | | | | | | | | | |
| K Braasch | 2 | 6 | 6 | | K Braasch | 2 | 3 | | | | | | | | | |
| A Boetsch | 6 | 4 | 2 | | | | | 3 | K Nováček | 6 | 7$^7$ | | | | | |
| T Benhabiles | 3 | 6 | 6 | | | | | 13 | M Vajda | 1 | 6$^4$ | | | | | |
| A Võsand | 6 | 4 | 2 | | T Benhabiles | 3 | 3 | | | | | | | | | |
| | | | | 13 | M Vajda | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | 3 | K Nováček | 7 | 0 | 7 |
| | | | | | | | | | | | | 5 | H Skoff | 5 | 6 | 5 |
| | | | | 11 | J Sánchez | 7 | 6 | | | | | | | | | |
| T Carbonell | 6 | 1 | 3 | | D Poliakov | 5 | 2 | | | | | | | | | |
| D Poliakov | 4 | 6 | 6 | | | | | 11 | J Sánchez | 4 | 3 | | | | | |
| C Saceanu | 4 | 1 | | | | | | 5 | H Skoff | 6 | 6 | | | | | |
| R Gilbert | 6 | 6 | | | R Gilbert | 2 | 1 | | | | | | | | | |
| | | | | 5 | H Skoff | 6 | 6 | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 6 | A Mancini | 7$^8$ | 7$^7$ | | | | | | | | | | | |
| | O Delaître | 7$^8$ | 6 | | | O Delaître | 6$^6$ | 6$^4$ | | | | | | | | | | | |
| WC | R Wawra | 6$^6$ | 1 | | | | | | | 6 | A Mancini | 2 | 2 | | | | | | |
| WC | T Buchmayer | 6 | 0 | 6 | | | | | | 12 | T Champion | 6 | 6 | | | | | | |
| | F Roig | 4 | 6 | 2 | WC | T Buchmayer | 6 | 4 | 6$^4$ | | | | | | | | | | |
| | | | | | 12 | T Champion | 3 | 6 | 7$^7$ | | | | | | | | | | |
| | | | | | | | | | | | | | | | 12 | T Champion | 6 | 3 | 1 |
| | | | | | | | | | | | | | | | 4 | M Gustafsson | 4 | 6 | 6 |
| | | | | | 14 | T Muster | 6 | 6 | | | | | | | | | | | |
| | M Střelba | 6 | 5 | 0 | | J Anderson | 3 | 1 | | | | | | | | | | | |
| | J Anderson | 4 | 7 | 6 | | | | | | 14 | T Muster | 5 | 6 | 3 | | | | | |
| | D Nargiso | 6 | 6 | | | | | | | 4 | M Gustafsson | 7 | 2 | 6 | | | | | |
| | A Rahunen | 2 | 2 | | | D Nargiso | 4 | 5 | | | | | | | | | | | |
| | | | | | 4 | M Gustafsson | 6 | 7 | | | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 8 | M Jaite | 6 | 6$^1$ | 6 | | | | | | | | | | |
| WC | E Jelen | 7$^7$ | 7$^8$ | | WC | E Jelen | 3 | 7$^7$ | 2 | | | | | | | | | | |
| | U Riglewski | 6$^3$ | 6$^6$ | | | | | | | 8 | M Jaite | 6 | 6 | | | | | | |
| | A Olhovskiy | 4 | 4 | | | | | | | 10 | C Bergström | 4 | 3 | | | | | | |
| WC | G Mandl | 6 | 6 | | WC | G Mandl | 6$^5$ | 7$^7$ | 6$^5$ | | | | | | | | | | |
| | | | | | 10 | C Bergström | 7$^7$ | 6$^4$ | 7$^7$ | | | | | | | | | | |
| | | | | | | | | | | | | | | | 8 | M Jaite | 6 | 3 | 6 |
| | | | | | | | | | | | | | | | 2 | E Sánchez | 3 | 6 | 3 |
| | | | | | 16 | C Pioline | 6$^4$ | 2 | | | | | | | | | | | |
| Q | R Vogel | 6 | 6 | | Q | R Vogel | 7$^7$ | 6 | | | | | | | | | | | |
| | C Motta | 2 | 3 | | | | | | | Q | R Vogel | 3 | 6 | 2 | | | | | |
| Q | É Winogradsky | 6 | 6$^4$ | 6 | | | | | | 2 | E Sánchez | 6 | 4 | 6 | | | | | |
| Q | T Guardiola | 4 | 7$^7$ | 3 | Q | É Winogradsky | 6$^4$ | 4 | | | | | | | | | | | |
| | | | | | 2 | E Sánchez | 7$^7$ | 6 | | | | | | | | | | | |