# 2023 Swiss Open Gstaad – Singles

Pedro Cachin defeated Albert Ramos Viñolas in the final, 3–6, 6–0, 7–5 to win the singles tennis title at the 2023 Swiss Open Gstaad. It was his first ATP Tour singles title.
Casper Ruud was the two-time reigning champion, but chose to compete in Båstad instead.

## Seeds

The top four seeds received a bye into the second round.
* Roberto Bautista Agut (second round)
* Miomir Kecmanović (semifinals)
* Lorenzo Sonego (second round)
* Yannick Hanfmann (quarterfinals)
* Zhang Zhizhen (first round)
* Roberto Carballés Baena (first round, retired)
* Mikael Ymer (suspended for violating anti-doping rules)
* Laslo Djere (first 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 |
| | Pedro Cachin | 6 | 6 | | | | |
| Q | Hamad Medjedovic | 3 | 1 | | | | |
| Q | Hamad Medjedovic | 3 | 1 | Pedro Cachin | 3 | 6 | 7 |
| | | | | Albert Ramos Viñolas | 6 | 0 | 5 |
| | Albert Ramos Viñolas | 6 | 6 | Albert Ramos Viñolas | 6 | 0 | 5 |
| 2 | Miomir Kecmanović | 2 | 3 | | | | |

### 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 | R Bautista Agut | 6$^4$ | 6$^3$ | | | | | | | | | |
| | P Cachin | 6 | 6 | | | P Cachin | 7$^7$ | 7$^7$ | | | | | | | | | |
| | T Daniel | 4 | 1 | | | | | | | | P Cachin | 6 | 6 | | | | |
| | J Munar | 6 | 6 | | | | | | | | J Munar | 3 | 3 | | | | |
| WC | A Ritschard | 3 | 3 | | | J Munar | 7$^7$ | 6 | | | | | | | | | |
| | S Wawrinka | 6 | 3 | | | S Wawrinka | 6$^3$ | 1 | | | | | | | | | |
| 6 | R Carballés Baena | 1 | 1$^r$ | | | | | | | | | | | | P Cachin | 6 | 6 |
| | | | | | | | | | | | | | | Q | H Medjedovic | 3 | 1 |
| | | | | | 4 | Y Hanfmann | 4 | 6 | 7 | | | | | | | | |
| | B Bonzi | 3 | 4 | | | D Altmaier | 6 | 2 | 5 | | | | | | | | |
| | D Altmaier | 6 | 6 | | | | | | | 4 | Y Hanfmann | 3 | 3 | | | | |
| | A Müller | 1 | 6$^4$ | | | | | | | Q | H Medjedovic | 6 | 6 | | | | |
| | D Thiem | 6 | 7$^7$ | | | D Thiem | 5 | 6 | 3 | | | | | | | | |
| Q | H Medjedovic | 4 | 6 | 6 | Q | H Medjedovic | 7 | 2 | 6 | | | | | | | | |
| 5 | Z Zhang | 6 | 1 | 4 | | | | | | | | | | | | | |

### 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 |
| LL | O Virtanen | 2 | 3 | | | | | | | | | | | | | | | |
| | JP Varillas | 6 | 6 | | | JP Varillas | 6 | 6 | | | | | | | | | | |
| | A Rinderknech | 2 | 6 | 3 | Q | F Bagnis | 2 | 1 | | | | | | | | | | |
| Q | F Bagnis | 6 | 2 | 6 | | | | | | | JP Varillas | 7$^7$ | 1 | 4 | | | | |
| | A Ramos Viñolas | 6 | 2 | 6 | | | | | | | A Ramos Viñolas | 6$^2$ | 6 | 6 | | | | |
| WC | F Fognini | 1 | 6 | 2 | | A Ramos Viñolas | 6 | 3 | 6 | | | | | | | | | |
| | | | | | 3 | L Sonego | 3 | 6 | 4 | | | | | | | | | |
| | | | | | | | | | | | | | | | | A Ramos Viñolas | 6 | 6 |
| 8 | L Djere | 0 | 6 | 3 | | | | | | | | | | | 2 | M Kecmanović | 2 | 3 |
| Q | Z Bergs | 6 | 4 | 6 | Q | Z Bergs | 7$^{10}$ | 4 | 7$^7$ | | | | | | | | | |
| | M-A Hüsler | 3 | 5 | | Q | J Rodionov | 6$^8$ | 6 | 6$^4$ | | | | | | | | | |
| Q | J Rodionov | 6 | 7 | | | | | | | Q | Z Bergs | 4 | 6 | 5 | | | | |
| | A Fils | 6$^4$ | 6$^4$ | | | | | | | 2 | M Kecmanović | 6 | 3 | 7 | | | | |
| WC | D Stricker | 7$^7$ | 7$^7$ | | WC | D Stricker | 6$^4$ | 1 | | | | | | | | | | |
| | | | | | 2 | M Kecmanović | 7$^7$ | 6 | | | | | | | | | | |

## Qualifying
### Seeds

* Jurij Rodionov (qualified)
* Facundo Bagnis (qualified)
* Otto Virtanen (qualifying competition, lucky loser)
* Thiago Seyboth Wild (first round)
* Thiago Agustín Tirante (first round)
* Raúl Brancaccio (first round)
* Ivan Gakhov (first round)
* Hamad Medjedovic (qualified)

### Qualifiers

* Jurij Rodionov
* Facundo Bagnis
* Hamad Medjedovic
* Zizou Bergs

### Lucky loser

* Otto Virtanen

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Jurij Rodionov | 6 | 7$^7$ | | | | |
| WC | Mika Brunold | 1 | 6$^1$ | | | | |
| WC | Mika Brunold | 1 | 6$^1$ | 1 | Jurij Rodionov | 6 | 6 |
| | | | | | Maximilian Neuchrist | 3 | 4 |
| | Maximilian Neuchrist | 6 | 6 | | Maximilian Neuchrist | 3 | 4 |
| 7 | Ivan Gakhov | 3 | 3 | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Facundo Bagnis | 7$^7$ | 6 | | | | |
| WC | Kilian Feldbausch | 6$^3$ | 3 | | | | |
| WC | Kilian Feldbausch | 6$^3$ | 3 | 2 | Facundo Bagnis | 6 | 6 |
| | | | | | Geoffrey Blancaneaux | 3 | 2 |
| | Geoffrey Blancaneaux | 6 | 6 | | Geoffrey Blancaneaux | 3 | 2 |
| 6 | Raúl Brancaccio | 4 | 3 | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Otto Virtanen | 6 | 7$^7$ | | | | |
| | Alexander Weis | 3 | 6$^4$ | | | | |
| | Alexander Weis | 3 | 6$^4$ | 3 | Otto Virtanen | 6$^5$ | 4 |
| | | | | 8 | Hamad Medjedovic | 7$^7$ | 6 |
| | Federico Gaio | 3 | 6$^4$ | 8 | Hamad Medjedovic | 7$^7$ | 6 |
| 8 | Hamad Medjedovic | 6 | 7$^7$ | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Thiago Seyboth Wild | 6 | 2 | 6$^4$ | | | |
| | Zizou Bergs | 3 | 6 | 7$^7$ | | | |
| | Zizou Bergs | 3 | 6 | 7$^7$ | Zizou Bergs | 6 | 6 |
| | | | | | Marco Trungelliti | 3 | 4 |
| | Marco Trungelliti | 6 | 6 | | Marco Trungelliti | 3 | 4 |
| 5 | Thiago Agustín Tirante | 3 | 3 | | | | |