# 1989 Lorraine Open – Singles

Jonas Svensson was the defending champion but did not compete that year.
Guy Forget won in the final 6–3, 7–6 against Michiel Schapers.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Darren Cahill (second round)
* Ronald Agénor (quarterfinals)
* Guy Forget (champion)
* Jan Gunnarsson (first round)
* Eric Jelen (first round)
* Richard Matuszewski (first round)
* Michiel Schapers (final)
* Thierry Tulasne (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
| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | D Cahill | 4 | 6 | 7 | | | | | | | | | | | | | | | | | | |
| | E Winogradsky | 6 | 3 | 6 | 1 | D Cahill | 4 | 1 | | | | | | | | | | | | | | |
| | J Carlsson | 6 | 3 | 6 | | J Carlsson | 6 | 6 | | | | | | | | | | | | | | |
| | S Guy | 4 | 6 | 3 | | | | | | | J Carlsson | 4 | 7 | 3 | | | | | | | | |
| | B Dyke | 4 | 6 | | | | | | | | E Masso | 6 | 5 | 6 | | | | | | | | |
| | E Masso | 6 | 7 | | | E Masso | 6 | 2 | 7 | | | | | | | | | | | | | |
| | Y Doumbia | 6 | 1 | | 8 | T Tulasne | 4 | 6 | 6 | | | | | | | | | | | | | |
| 8 | T Tulasne | 7 | 6 | | | | | | | | | | | | | E Masso | 3 | 5 | | | | |
| 3 | G Forget | 6 | 6 | | | | | | | | | | | | 3 | G Forget | 6 | 7 | | | | |
| | T Nelson | 2 | 2 | | 3 | G Forget | 7 | 6 | | | | | | | | | | | | | | |
| | C Mezzadri | 6 | 7 | | | C Mezzadri | 5 | 4 | | | | | | | | | | | | | | |
| WC | M Bahrami | 1 | 6 | | | | | | | 3 | G Forget | 6 | 6 | | | | | | | | | |
| Q | A Boetsch | 6 | 6 | | | | | | | | O Delaître | 4 | 3 | | | | | | | | | |
| | C Panatta | 4 | 4 | | Q | A Boetsch | 4 | 6 | 2 | | | | | | | | | | | | | |
| | O Delaître | 6 | 6 | | | O Delaître | 6 | 1 | 6 | | | | | | | | | | | | | |
| 6 | R Matuszewski | 3 | 2 | | | | | | | | | | | | | | | | 3 | Guy Forget | 6 | 7 |
| 5 | E Jelen | 5 | 6 | 6 | | | | | | | | | | | | | | | 7 | Michiel Schapers | 3 | 6 |
| | R Stadler | 7 | 4 | 3 | 5 | E Jelen | 1 | 2 | | | | | | | | | | | | | | |
| | O Rahnasto | 4 | 6 | | | J Bates | 6 | 6 | | | | | | | | | | | | | | |
| | J Bates | 6 | 7 | | | | | | | | J Bates | 4 | 4 | | | | | | | | | |
| | P Chamberlin | 6 | 6 | | | | | | | | P Chamberlin | 6 | 6 | | | | | | | | | |
| | P Wekesa | 4 | 3 | | | P Chamberlin | 7 | 6 | | | | | | | | | | | | | | |
| | J Potier | 7 | 7 | | | J Potier | 6 | 4 | | | | | | | | | | | | | | |
| 4 | J Gunnarsson | 5 | 6 | | | | | | | | | | | | | P Chamberlin | 2 | 0$^r$ | | | | |
| 7 | M Schapers | 6 | 6 | | | | | | | | | | | | 7 | M Schapers | 6 | 1 | | | | |
| | N Kulti | 3 | 4 | | 7 | M Schapers | 6 | 7 | | | | | | | | | | | | | | |
| Q | G Raoux | 6 | 6 | | Q | G Raoux | 3 | 5 | | | | | | | | | | | | | | |
| | U Riglewski | 3 | 4 | | | | | | | 7 | M Schapers | 7 | 7 | | | | | | | | | |
| Q | M Ostoja | 3 | 7 | 1 | | | | | | 2 | R Agénor | 6 | 6 | | | | | | | | | |
| Q | D Durand | 6 | 6 | 6 | Q | D Durand | 2 | 3 | | | | | | | | | | | | | | |
| | H Moraing | 5 | 4 | | 2 | R Agénor | 6 | 6 | | | | | | | | | | | | | | |
| 2 | R Agénor | 7 | 6 | | | | | | | | | | | | | | | | | | | |