1991 Grand Prix de Tennis de Lyon – Singles
# 1991 Grand Prix de Tennis de Lyon – Singles

Marc Rosset was the defending champion, but lost in the first round this year.

Pete Sampras won the title, beating Olivier Delaître 6–1, 6–1 in the final.

## Seeds

* Guy Forget (first round)
* Pete Sampras (champion)
* Sergi Bruguera (semifinals)
* Brad Gilbert (semifinals)
* Derrick Rostagno (first round)
* Alberto Mancini (quarterfinals)
* Jonas Svensson (quarterfinals)
* Marc Rosset (first 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

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| - | - | - | - | - | - | - | - |
| WC | Olivier Delaître | 6 | 6 | | | | |
| 3 | Sergi Bruguera | 4 | 4 | | | | |
| 3 | Sergi Bruguera | 4 | 4 | WC | Olivier Delaître | 1 | 1 |
| | | | | 2 | Pete Sampras | 6 | 6 |
| 4 | Brad Gilbert | 1 | 2 | 2 | Pete Sampras | 6 | 6 |
| 2 | Pete Sampras | 6 | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | G Forget | 6 | 4 | 3 | | | | | | | | | | | | | |
| WC | O Delaître | 1 | 6 | 6 | WC | O Delaître | 6 | $6^6$ | $7^7$ | | | | | | | | |
| | C Pioline | 7 | $6^5$ | 6 | | C Pioline | 2 | $7^8$ | $6^3$ | | | | | | | | |
| | T Carbonell | 5 | $7^7$ | 3 | | | | | | WC | O Delaître | 6 | $7^7$ | | | | |
| | J Kriek | $7^7$ | 6 | | | | | | | | J Kriek | 2 | $6^3$ | | | | |
| | S Pescosolido | $6^5$ | 3 | | | J Kriek | 6 | 6 | | | | | | | | | |
| | F Santoro | 6 | 6 | | | F Santoro | 4 | 4 | | | | | | | | | |
| 8 | M Rosset | 1 | 3 | | | | | | | | | | | WC | O Delaître | 6 | 6 |
| 3 | S Bruguera | 3 | 6 | 6 | | | | | | | | | | 3 | S Bruguera | 4 | 4 |
| SE | A Boetsch | 6 | 3 | 4 | 3 | S Bruguera | $7^{10}$ | $7^7$ | | | | | | | | | |
| | J-P Fleurian | 3 | 2 | | | G Raoux | $6^8$ | $6^2$ | | | | | | | | | |
| | G Raoux | 6 | 6 | | | | | | | 3 | S Bruguera | 6 | $7^7$ | | | | |
| WC | F Fontang | 0 | $6^4$ | | | | | | | | K Curren | 0 | $6^3$ | | | | |
| SE | C van Rensburg | 6 | $7^7$ | | SE | C van Rensburg | 1 | 2 | | | | | | | | | |
| | K Curren | $6^5$ | $7^7$ | $7^7$ | | K Curren | 6 | 6 | | | | | | | | | |
| 5 | D Rostagno | $7^7$ | $6^3$ | $6^4$ | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 6 | A Mancini | 2 | 7 | $7^7$ | | | | | | | | | | | | | |
| | C Saceanu | 6 | 5 | $6^2$ | 6 | A Mancini | $7^{10}$ | 6 | | | | | | | | | |
| | N Kulti | 6 | 6 | | | N Kulti | $6^8$ | 4 | | | | | | | | | |
| | V Paloheimo | 2 | 4 | | | | | | | 6 | A Mancini | 2 | 2 | | | | |
| Q | É Winogradsky | 6 | 3 | 6 | | | | | | 4 | B Gilbert | 6 | 6 | | | | |
| Q | S DeVries | 1 | 6 | 3 | Q | É Winogradsky | 5 | 1 | | | | | | | | | |
| | A Mronz | 3 | 5 | | 4 | B Gilbert | 7 | 6 | | | | | | | | | |
| 4 | B Gilbert | 6 | 7 | | | | | | | | | | | 4 | B Gilbert | 1 | 2 |
| 7 | J Svensson | 1 | 6 | $7^7$ | | | | | | | | | | 2 | P Sampras | 6 | 6 |
| | P Kühnen | 6 | 3 | $6^3$ | 7 | J Svensson | $6^4$ | 6 | 6 | | | | | | | | |
| | R Agénor | $6^9$ | 7 | 7 | | R Agénor | $7^7$ | 3 | 1 | | | | | | | | |
| Q | Y Doumbia | $7^{11}$ | 5 | 5 | | | | | | 7 | J Svensson | 2 | 2 | | | | |
| | T Champion | 6 | 6 | | | | | | | 2 | P Sampras | 6 | 6 | | | | |
| WC | Y Noah | 4 | 4 | | | T Champion | 1 | 3 | | | | | | | | | |
| Q | T Nijssen | 3 | 2 | | 2 | P Sampras | 6 | 6 | | | | | | | | | |
| 2 | P Sampras | 6 | 6 | | | | | | | | | | | | | | |
