# 2023 Challenger Città di Lugano – Singles

Luca Nardi was the defending champion but chose not to defend his title.
Otto Virtanen won the title after defeating Cem İlkel 6–4, 7–6$^{(7–5)}$ in the final.

## Seeds

* Gijs Brouwer (first round)
* Dominic Stricker (semifinals)
* Norbert Gombos (first round)
* Raúl Brancaccio (second round)
* Liam Broady (quarterfinals)
* Zizou Bergs (first round)
* Lukáš Klein (first round)
* Jelle Sels (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 | Semifinals | Final | Final | Final | Final |
| Q | Cem İlkel | 7$^7$ | 4 | 6 | | | | |
| | Antoine Escoffier | 6$^5$ | 6 | 3 | | | | |
| | Antoine Escoffier | 6$^5$ | 6 | 3 | Q | Cem İlkel | 4 | 6$^5$ |
| | | | | | | Otto Virtanen | 6 | 7$^7$ |
| | Otto Virtanen | 6$^3$ | 6 | 6 | | Otto Virtanen | 6 | 7$^7$ |
| 2 | Dominic Stricker | 7$^7$ | 3 | 0 | | | | |

### 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 | G Brouwer | 2 | 5 | | | | | | | | | | | | | | | |
| | A Çelikbilek | 6 | 7 | | | A Çelikbilek | 4 | 3 | | | | | | | | | | |
| Q | V Sachko | 6 | 6 | | Q | V Sachko | 6 | 6 | | | | | | | | | | |
| WC | J Paul | 4 | 3 | | | | | | | Q | V Sachko | 2 | 5 | | | | | |
| | Z Piros | 6 | 4 | 5 | | | | | | Q | C İlkel | 6 | 7 | | | | | |
| | A Ritschard | 3 | 6 | 7 | | A Ritschard | 6 | 1 | 4 | | | | | | | | | |
| Q | C İlkel | 6 | 4 | 7 | Q | C İlkel | 2 | 6 | 6 | | | | | | | | | |
| 7 | L Klein | 4 | 6 | 5 | | | | | | | | | | Q | C İlkel | 7$^7$ | 4 | 6 |
| 4 | R Brancaccio | 6 | 1 | | | | | | | | | | | | A Escoffier | 6$^5$ | 6 | 3 |
| | P Gojowczyk | 1 | 0$^r$ | | 4 | R Brancaccio | 5 | 3 | | | | | | | | | | |
| WC | M Brunold | 4 | 6 | 6 | WC | M Brunold | 7 | 6 | | | | | | | | | | |
| | M Guinard | 6 | 2 | 2 | | | | | | WC | M Brunold | 0 | 3 | | | | | |
| | A Andreev | 6$^4$ | 7$^7$ | 6 | | | | | | | A Escoffier | 6 | 6 | | | | | |
| | A Bellier | 7$^7$ | 6$^4$ | 3 | | A Andreev | 6$^6$ | 3 | | | | | | | | | | |
| | A Escoffier | 6 | 6 | | | A Escoffier | 7$^8$ | 6 | | | | | | | | | | |
| 6 | Z Bergs | 2 | 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 | Semifinals |
| 8 | J Sels | 4 | 5 | | | | | | | | | | | | | | | | |
| | O Krutykh | 6 | 7 | | | O Krutykh | 4 | 6 | 6$^5$ | | | | | | | | | | |
| | O Virtanen | 6$^4$ | 6 | 6 | | O Virtanen | 6 | 2 | 7$^7$ | | | | | | | | | | |
| | M Gigante | 7$^7$ | 3 | 2 | | | | | | | O Virtanen | 6 | 6 | | | | | | |
| | H Grenier | 7$^7$ | 6 | | | | | | | | R Berankis | 4 | 3 | | | | | | |
| Q | C Hemery | 6$^4$ | 1 | | | H Grenier | 4 | 6 | 5 | | | | | | | | | | |
| | R Berankis | 6 | 7$^7$ | | | R Berankis | 6 | 1 | 7 | | | | | | | | | | |
| 3 | N Gombos | 3 | 6$^2$ | | | | | | | | | | | | | O Virtanen | 6$^3$ | 6 | 6 |
| 5 | L Broady | 6 | 6 | | | | | | | | | | | | 2 | D Stricker | 7$^7$ | 3 | 0 |
| | M Kukushkin | 3 | 2 | | 5 | L Broady | 6 | 6 | | | | | | | | | | | |
| Q | M Copil | 6$^{11}$ | 0$^r$ | | WC | P-H Herbert | 1 | 3 | | | | | | | | | | | |
| WC | P-H Herbert | 7$^{13}$ | 0 | | | | | | | 5 | L Broady | 6 | 3 | 6$^4$ | | | | | |
| Q | G Onclin | 6 | 6 | | | | | | | 2 | D Stricker | 3 | 6 | 7$^7$ | | | | | |
| Q | D Added | 4 | 2 | | Q | G Onclin | 3 | 3 | | | | | | | | | | | |
| Alt | R Collignon | 4 | 6 | 2 | 2 | D Stricker | 6 | 6 | | | | | | | | | | | |
| 2 | D Stricker | 6 | 2 | 6 | | | | | | | | | | | | | | | |