| Champ: | Nicolás Jarry |
| Runner: | Grigor Dimitrov |
| Score: | 7–6(7–1), 6–1 |
| Draw: | 28 (4 / 3) |
| Seeds: | 8 |
| Type: | singles doubles |
See main article: 2023 Geneva Open.
Nicolás Jarry defeated Grigor Dimitrov in the final, 7–6(7–1), 6–1 to win the singles tennis title at the 2023 Geneva Open.
Casper Ruud was the two-time defending champion,[1] but was defeated in the quarterfinals by Jarry.
The top four seeds receive a bye into the second round.