# 2023 Sanremo Challenger – Singles

Holger Rune was the defending champion but chose not to defend his title.
Luca Van Assche won the title after defeating Juan Pablo Varillas 6–1, 6–3 in the final.

## Seeds

* Juan Pablo Varillas (final)
* Marco Cecchinato (first round)
* Alexander Shevchenko (second round)
* Aslan Karatsev (first round)
* Luca Van Assche (champion)
* Matteo Arnaldi (first round)
* Pavel Kotov (first round, retired)
* Giulio Zeppieri (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 | Final | Final | Final | Final |
| 1 | Juan Pablo Varillas | 6 | 6 | | | | |
| Q | Kimmer Coppejans | 3 | 4 | | | | |
| Q | Kimmer Coppejans | 3 | 4 | 1 | Juan Pablo Varillas | 1 | 3 |
| | | | | 5 | Luca Van Assche | 6 | 6 |
| 5 | Luca Van Assche | 7$^7$ | 6 | 5 | Luca Van Assche | 6 | 6 |
| | Vít Kopřiva | 6$^4$ | 2 | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | JP Varillas | 6 | 7$^7$ | | | | | | | | | | | | | | | |
| Q | F Arnaboldi | 4 | 6$^1$ | | 1 | JP Varillas | 6 | 1 | 6 | | | | | | | | | |
| | A Pellegrino | 7$^9$ | 6 | | | A Pellegrino | 4 | 6 | 1 | | | | | | | | | |
| WC | M Gigante | 6$^7$ | 4 | | | | | | | 1 | JP Varillas | 3 | 6 | 6 | | | | |
| Q | V Vacherot | 3 | 3 | | | | | | | Q | A Vavassori | 6 | 3 | 4 | | | | |
| Q | Edoardo Lavagno | 6 | 6 | | Q | E Lavagno | 5 | 6$^5$ | | | | | | | | | | |
| Q | A Vavassori | 4 | 7 | 4 | Q | A Vavassori | 7 | 7$^7$ | | | | | | | | | | |
| 7 | P Kotov | 6 | 5 | 0$^r$ | | | | | | | | | | | 1 | JP Varillas | 6 | 6 |
| 4 | A Karatsev | 7 | 2 | 3 | | | | | | | | | | | Q | K Coppejans | 3 | 4 |
| Q | K Coppejans | 5 | 6 | 6 | Q | K Coppejans | 6 | 7 | | | | | | | | | | |
| | M Guinard | 2 | 3 | | | S Ofner | 4 | 5 | | | | | | | | | | |
| | S Ofner | 6 | 6 | | | | | | | Q | K Coppejans | 6 | 6$^2$ | 7$^7$ | | | | |
| | J Kovalík | 6 | 6 | | | | | | | | Z Piros | 1 | 7$^7$ | 6$^4$ | | | | |
| SE | B Harris | 2 | 1 | | | J Kovalík | 3 | 6$^6$ | | | | | | | | | | |
| | Z Piros | 6 | 7$^7$ | | | Z Piros | 6 | 7$^8$ | | | | | | | | | | |
| 6 | M Arnaldi | 3 | 6$^3$ | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | L Van Assche | 2 | 6 | 6 | | | | | | | | | | | | |
| | R Peniston | 6 | 3 | 2 | 5 | L Van Assche | 6 | 6 | | | | | | | | |
| WC | G Ferrari | 1 | 6$^2$ | | Q | G Fonio | 3 | 3 | | | | | | | | |
| Q | G Fonio | 6 | 7$^7$ | | | | | | 5 | L Van Assche | 6 | 6 | | | | |
| | A Müller | 1 | 6 | 6 | | | | | | A Müller | 2 | 1 | | | | |
| | K Uchida | 6 | 3 | 3 | | A Müller | 7 | 6 | | | | | | | | |
| | C-h Tseng | 3 | 3 | | 3 | A Shevchenko | 5 | 2 | | | | | | | | |
| 3 | A Shevchenko | 6 | 6 | | | | | | | | | | 5 | L Van Assche | 7$^7$ | 6 |
| 8 | G Zeppieri | 6 | 6 | | | | | | | | | | | V Kopřiva | 6$^4$ | 2 |
| SE | A Giannessi | 1 | 1 | | 8 | G Zeppieri | 6$^4$ | 3 | | | | | | | | |
| | L Nardi | 4 | 4 | | WC | G Mager | 7$^7$ | 6 | | | | | | | | |
| WC | G Mager | 6 | 6 | | | | | | WC | G Mager | 4 | 3 | | | | |
| | F Cobolli | 6 | 6 | | | | | | | V Kopřiva | 6 | 6 | | | | |
| | F Maestrelli | 4 | 4 | | | F Cobolli | 3 | 1 | | | | | | | | |
| | V Kopřiva | 6 | 6 | | | V Kopřiva | 6 | 6 | | | | | | | | |
| 2 | M Cecchinato | 4 | 4 | | | | | | | | | | | | | |