| Singles | |
|---|---|
| 1989 Lorraine Open | |
| 1988 Champion |  Jonas Svensson |
| Champion |  Guy Forget |
| Runner-up |  Michiel Schapers |
| Final score | 6–3, 7–6 |
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.
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)| First round | Second round | Quarterfinals | Semifinals | 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 | 0r | ||||||||||||||||||||||||||||
| 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 | |||||||||||||||||||||||||||||||
Miloslav Mečíř defeated Michiel Schapers 6–4, 6–3, 3–6, 6–4 to win the 1986 Heineken Open singles competition. Chris Lewis was the champion but did not defend his title.
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The 1988 Grand Prix de Tennis de Toulouse was a men's tennis tournament played on indoor carpet courts in Toulouse, France that was part of the Regular Series of the 1988 Grand Prix tennis circuit. It was the seventh edition of the tournament and was held from 10 October – 16 October.
The 1988 Grand Prix de Tennis de Toulouse was a men's tennis tournament played on indoor carpet in Toulouse, France that was part of the Regular Series of the 1988 Grand Prix tennis circuit. It was the seventh edition of the tournament and was held from 10 October – 16 October.
The 1992 Grand Prix de Tennis de Toulouse was a men's tennis tournament played on indoor carpet courts in Toulouse, France that was part of the World Series of the 1992 ATP Tour. It was the eleventh edition of the tournament and was held from 5 October – 11 October.
The 1995 Grand Prix de Tennis de Toulouse was a men's tennis tournament played on indoor hard courts in Toulouse, France that was part of the World Series of the 1995 ATP Tour. It was the fourteenth edition of the tournament and was held from 2 October – 8 October.
Jonas Svensson was the defending champion, but lost in the second round to Jacco Eltingh.