# 1986 Geneva Open – Singles

Tomáš Šmíd was the defending champion but did not participate this year.
Henri Leconte won the title, defeating Thierry Tulasne 7–5, 6–3 in the final.

## Seeds

* Henri Leconte (champion)
* Thierry Tulasne (final)
* Horacio de la Peña (first round)
* Fernando Luna (quarterfinals)
* Pablo Arraya (first round)
* Ronald Agénor (first round)
* Michiel Schapers (first round)
* Mel Purcell (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

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Henri Leconte | 6 | 6 | | | | |
| | Eduardo Bengoechea | 4 | 3 | | | | |
| | Eduardo Bengoechea | 4 | 3 | 1 | Henri Leconte | 7 | 6 |
| | | | | 2 | Thierry Tulasne | 5 | 3 |
| | Christian Miniussi | 2 | 0 | 2 | Thierry Tulasne | 5 | 3 |
| 2 | Thierry Tulasne | 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 | H Leconte | 6 | 6 | | | | | | | | | | | | | | |
| | R Argüello | 4 | 1 | | 1 | H Leconte | 6 | 6 | | | | | | | | | |
| | A Ganzábal | 4 | 3 | | | J Windahl | 3 | 3 | | | | | | | | | |
| | J Windahl | 6 | 6 | | | | | | | 1 | H Leconte | 6 | 6 | | | | |
| | J Lópe-Maeso | 5 | 6 | 2 | | | | | | | M Wostenholme | 4 | 3 | | | | |
| | M Wostenholme | 7 | 4 | 6 | | M Wostenholme | 6 | 6 | | | | | | | | | |
| | N Aerts | 1 | 6 | 2 | 8 | M Purcell | 2 | 1 | | | | | | | | | |
| 8 | M Purcell | 6 | 3 | 6 | | | | | | | | | | 1 | H Leconte | 6 | 6 |
| 3 | H de la Peña | 3 | 5 | | | | | | | | | | | | E Bengoechea | 4 | 3 |
| | A Maurer | 6 | 7 | | | A Maurer | 4 | 2 | | | | | | | | | |
| | J Avendaño | 6 | 7 | | | J Avendaño | 6 | 6 | | | | | | | | | |
| | R Båthman | 3 | 6 | | | | | | | | J Avendaño | 3 | 6 | | | | |
| | E Bengoechea | 7 | 6 | | | | | | | | E Bengoechea | 6 | 7 | | | | |
| Q | G Tiberti | 6 | 2 | | | E Bengoechea | 3 | 6 | 6 | | | | | | | | |
| Q | C Castellan | 3 | 6 | 7 | Q | C Castellan | 6 | 3 | 0 | | | | | | | | |
| 6 | R Agénor | 6 | 4 | 6 | | | | | | | | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | P Arraya | 1 | 4 | | | | | | | | | | | | | | | |
| | C Miniussi | 6 | 6 | | | C Miniussi | 6 | 6 | | | | | | | | | | |
| WC | R Hertzog | 4 | 3 | | | J Brown | 3 | 0 | | | | | | | | | | |
| | J Brown | 6 | 6 | | | | | | | | C Miniussi | 4 | 6 | 6 | | | | |
| | JA Rodríguez | 4 | 5 | | | | | | | 4 | F Luna | 6 | 4 | 4 | | | | |
| | J Arrese | 6 | 7 | | | J Arrese | 0 | 3 | | | | | | | | | | |
| WC | G Pérez Roldán | 5 | 0 | | 4 | F Luna | 6 | 6 | | | | | | | | | | |
| 4 | F Luna | 7 | 6 | | | | | | | | | | | | | C Miniussi | 2 | 0 |
| 7/WC | M Schapers | 1 | 1 | | | | | | | | | | | | 2 | T Tulasne | 6 | 6 |
| Q | J Bardou | 6 | 6 | | Q | J Bardou | 7 | 6 | | | | | | | | | | |
| | C di Laura | 6 | 6 | | | C di Laura | 6 | 4 | | | | | | | | | | |
| Q | P Torre | 4 | 4 | | | | | | | Q | J Bardou | 2 | 2 | | | | | |
| | M Ostoja | 2 | 1 | | | | | | | 2 | T Tulasne | 6 | 6 | | | | | |
| | R Stadler | 6 | 6 | | | R Stadler | 3 | 6 | 1 | | | | | | | | | |
| | L Mattar | 4 | 6 | 2 | 2 | T Tulasne | 6 | 1 | 6 | | | | | | | | | |
| 2 | T Tulasne | 6 | 3 | 6 | | | | | | | | | | | | | | |