# 1983 Geneva Open – Singles

Mats Wilander was the defending champion.
Wilander successfully defended his title, defeating Henrik Sundström 3–6, 6–1, 6–3 in the final.

## Seeds

* Mats Wilander (champion)
* Guillermo Vilas (semifinals)
* Henrik Sundström (final)
* Tomáš Šmíd (first round)
* Heinz Günthardt (quarterfinals)
* Anders Järryd (semifinals)
* Balázs Taróczy (second round)
* Jimmy Brown (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 | Semifinals | Final | Final | Final | Final | Final |
| 1 | Mats Wilander | 1 | 6 | 6 | | | | | |
| 6 | Anders Järryd | 6 | 4 | 2 | | | | | |
| 6 | Anders Järryd | 6 | 4 | 2 | 1 | Mats Wilander | 3 | 6 | 6 |
| | | | | | 3 | Henrik Sundström | 6 | 1 | 3 |
| 3 | Henrik Sundström | 6 | 7 | | 3 | Henrik Sundström | 6 | 1 | 3 |
| 2 | Guillermo Vilas | 3 | 5 | | | | | | |

### 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 | Semifinals |
| 1 | M Wilander | 6 | 6 | | | | | | | | | | | | | | | |
| | E Dibbs | 1 | 2 | | 1 | M Wilander | 6 | 6 | | | | | | | | | | |
| | P Složil | 7 | 6 | | | P Složil | 1 | 1 | | | | | | | | | | |
| | S Birner | 5 | 3 | | | | | | | 1 | M Wilander | 6 | 7 | | | | | |
| | C Mezzadri | 4 | 2 | | | | | | | | R Stadler | 1 | 5 | | | | | |
| | R Stadler | 6 | 6 | | | R Stadler | 7 | 4 | 6 | | | | | | | | | |
| | J Velasco Sr. | 2 | 0 | | 7 | B Taróczy | 5 | 6 | 3 | | | | | | | | | |
| 7 | B Taróczy | 6 | 6 | | | | | | | | | | | 1 | M Wilander | 1 | 6 | 6 |
| 4 | T Šmíd | 6 | 4 | 2 | | | | | | | | | | 6 | A Järryd | 6 | 4 | 2 |
| | C Panatta | 4 | 6 | 6 | | C Panatta | 6 | 6 | | | | | | | | | | |
| | Z Kuhárszky | 6 | 7 | | | Z Kuhárszky | 4 | 2 | | | | | | | | | | |
| | J Hlasek | 4 | 5 | | | | | | | | C Panatta | 4 | 4 | | | | | |
| Q | M Ostoja | 6 | 3 | | | | | | | 6 | A Järryd | 6 | 6 | | | | | |
| Q | J Windahl | 7 | 6 | | Q | J Windahl | 6 | 5 | 1 | | | | | | | | | |
| | D Keretić | 2 | r | | 6 | A Järryd | 4 | 7 | 6 | | | | | | | | | |
| 6 | A Järryd | 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 | H Günthardt | 1 | 6 | 6 | | | | | | | | | | | | | | |
| | K Carlsson | 6 | 1 | 2 | 5 | H Günthardt | 6 | 2 | 6 | | | | | | | | | |
| | J Gurfein | 1 | 3 | | | J Nyström | 3 | 6 | 3 | | | | | | | | | |
| | J Nyström | 6 | 6 | | | | | | | 5 | H Günthardt | 5 | 6 | 3 | | | | |
| Q | H Solomon | 6 | 6 | | | | | | | 3 | H Sundström | 7 | 4 | 6 | | | | |
| | G Forget | 4 | 2 | | Q | H Solomon | 4 | 3 | | | | | | | | | | |
| | H Simonsson | 4 | 6 | | 3 | H Sundström | 6 | 6 | | | | | | | | | | |
| 3 | H Sundström | 6 | 7 | | | | | | | | | | | | 3 | H Sundström | 6 | 7 |
| 8 | J Brown | 6 | 6 | | | | | | | | | | | | 2 | G Vilas | 3 | 5 |
| | E Edwards | 3 | 4 | | 8 | J Brown | 4 | 4 | | | | | | | | | | |
| Q | R Vizcaíno | 7 | 6 | | Q | R Vizcaíno | 6 | 6 | | | | | | | | | | |
| | D Visser | 5 | 2 | | | | | | | Q | R Vizcaíno | 1 | 0 | | | | | |
| | S Casal | 4 | 6 | 3 | | | | | | 2 | G Vilas | 6 | 6 | | | | | |
| | D Bedel | 6 | 2 | 6 | | D Bedel | 3 | 0 | | | | | | | | | | |
| | J Avendaño | 4 | 3 | | 2 | G Vilas | 6 | 6 | | | | | | | | | | |
| 2 | G Vilas | 6 | 6 | | | | | | | | | | | | | | | |