| Singles | |
|---|---|
| 2023 Città di Como Challenger | |
| Champion |  Thiago Seyboth Wild |
| Runner-up |  Pedro Martínez |
| Score | 5–7, 6–2, 6–3 |
Cedrik-Marcel Stebe was the defending champion [1] but chose not to defend his title.
Thiago Seyboth Wild won the title after defeating Pedro Martínez 5–7, 6–2, 6–3 in the final.
Thiago Seyboth Wild (champion)
Zsombor Piros (second round) Thiago Monteiro (first round)
Benoît Paire (semifinals) Pedro Martínez (final)
Flavio Cobolli (first round) Fabio Fognini (second round, retired)
Ivan Gakhov (second round, retired)| Semifinals | Final | ||||||||||||
| 1 | Thiago Seyboth Wild | 7 | 6 | ||||||||||
| 4 | Benoît Paire | 5 | 3 | ||||||||||
| 1 | Thiago Seyboth Wild | 5 | 6 | 6 | |||||||||
| 5 | Pedro Martínez | 7 | 2 | 3 | |||||||||
| WC | Stefano Napolitano | 2 | 64 | ||||||||||
| 5 | Pedro Martínez | 6 | 77 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | T Seyboth Wild | 6 | 6 | ||||||||||||||||||||||||
| F Agamenone | 3 | 4 | 1 | T Seyboth Wild | 6 | 6 | |||||||||||||||||||||
| Alt | N Sánchez Izquierdo | 3 | 7 | 3 | Alt |  L Neumayer | 3 | 4 | |||||||||||||||||||
| Alt | L Neumayer | 6 | 5 | 6 | 1 | T Seyboth Wild | 6 | 6 | |||||||||||||||||||
 J Sels | 2 | 2 |  R Molleker | 1 | 3 | ||||||||||||||||||||||
| A Giannessi | 6 | 6 | A Giannessi | 3 | 1 | ||||||||||||||||||||||
| R Molleker | 6 | 6 | R Molleker | 6 | 6 | ||||||||||||||||||||||
| 6 | F Cobolli | 3 | 3 | 1 | T Seyboth Wild | 7 | 6 | ||||||||||||||||||||
| 4 | B Paire | 6 | 6 | 4 | B Paire | 5 | 3 | ||||||||||||||||||||
| Q | C Hemery | 1 | 0 | 4 | B Paire | 5 | 6 | 3 | |||||||||||||||||||
 N Fatić | 2 | 4 | WC | L Carboni | 7 | 2 | 0r | ||||||||||||||||||||
| WC | Lorenzo Carboni | 6 | 6 | 4 | B Paire | 4 | 6 | 6 | |||||||||||||||||||
 D Kuzmanov | 6 | 6 | D Kuzmanov | 6 | 4 | 3 | |||||||||||||||||||||
| Q |  M Zekić | 2 | 3 | D Kuzmanov | 6 | 2 | |||||||||||||||||||||
 A Martin | 4 | 1 | 8 | I Gakhov | 2 | 0r | |||||||||||||||||||||
| 8 | I Gakhov | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7/WC | F Fognini | 3 | 6 | 6 | |||||||||||||||||||||||
 Gerard Campana Lee | 6 | 4 | 0 | 7/WC | F Fognini | 5 | 0r | ||||||||||||||||||||
| M Gigante | 3 | 0 | WC | S Napolitano | 7 | 3 | |||||||||||||||||||||
| WC | S Napolitano | 6 | 6 | WC | S Napolitano | 6 | 2 | 6 | |||||||||||||||||||
| Q | M Bourgue | 7 | 6 | Alt | L Darderi | 3 | 6 | 3 | |||||||||||||||||||
 D Ajduković | 5 | 1 | Q | M Bourgue | 62 | 2 | |||||||||||||||||||||
| Alt | L Darderi | 6 | 6 | Alt | L Darderi | 77 | 6 | ||||||||||||||||||||
| 3 | T Monteiro | 3 | 2 | WC | S Napolitano | 2 | 64 | ||||||||||||||||||||
| 5 | P Martínez | 6 | 6 | 5 | P Martínez | 6 | 77 | ||||||||||||||||||||
| Edoardo Lavagno | 0 | 1 | 5 | P Martínez | 6 | 77 | |||||||||||||||||||||
| Q | V Royer | 6 | 3 | 4 | Q | S Vincent Ruggeri | 4 | 64 | |||||||||||||||||||
| Q | Samuel Vincent Ruggeri | 3 | 6 | 6 | 5 | P Martínez | 6 | 6 | |||||||||||||||||||
 S Nagal | 6 | 0 | 77 | S Nagal | 4 | 4 | |||||||||||||||||||||
| R Bonadio | 4 | 6 | 64 | S Nagal | 6 | 6 | |||||||||||||||||||||
| Q | L Wessels | 2 | 4 | 2 | Z Piros | 3 | 4 | ||||||||||||||||||||
| 2 | Z Piros | 6 | 6 | ||||||||||||||||||||||||
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Cedrik-Marcel Stebe was the defending champion but chose not to defend his title.
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Thiago Seyboth Wild was the defending champion but chose not to defend his title.
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Francisco Comesaña was the defending champion but lost in the second round to Andrea Collarini.
This was the first edition of the tournament.
Thiago Monteiro was the defending champion but lost in the semifinals to Fabio Fognini.
Defending champion Félix Auger-Aliassime defeated Hubert Hurkacz in the final, 7–6(7–3), 7–6(7–5) to win the singles tennis title at the 2023 Swiss Indoors. He saved a match point en route to his fifth career ATP Tour title, in the quarterfinals against Alexander Shevchenko.
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