# 2023 Internazionali di Tennis Città di Vicenza – Singles

Andrea Pellegrino was the defending champion but chose not to defend his title.
Francisco Comesaña won the title after defeating Pablo Llamas Ruiz 3–6, 6–2, 6–2 in the final.

## Seeds

* Francesco Passaro (semifinals)
* Luca Nardi (quarterfinals)
* Vít Kopřiva (first round)
* Riccardo Bonadio (first round)
* Franco Agamenone (first round)
* Mattia Bellucci (second round)
* Kimmer Coppejans (first round)
* Sho Shimabukuro (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 | Final |
| 1 | Francesco Passaro | 6$^6$ | 3 | | | | | |
| Alt | Francisco Comesaña | 7$^8$ | 6 | | | | | |
| Alt | Francisco Comesaña | 7$^8$ | 6 | Alt | Francisco Comesaña | 3 | 6 | 6 |
| | | | | | Pablo Llamas Ruiz | 6 | 2 | 2 |
| Q | Román Andrés Burruchaga | 3 | 0 | | Pablo Llamas Ruiz | 6 | 2 | 2 |
| | Pablo Llamas Ruiz | 6 | 6 | | | | | |

### 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 | F Passaro | 7 | 6 | | | | | | | | | | | | | | |
| | M Neuchrist | 5 | 3 | | 1 | F Passaro | 6 | 1 | 7$^7$ | | | | | | | | |
| | ND Ionel | 6 | 6 | | | ND Ionel | 3 | 6 | 6$^2$ | | | | | | | | |
| Q | N Fatić | 4 | 4 | | | | | | | 1 | F Passaro | 6 | 6 | | | | |
| | M Gigante | 6 | 1 | 1 | | | | | | | S Rodríguez Taverna | 3 | 4 | | | | |
| | S Rodríguez Taverna | 1 | 6 | 6 | | S Rodríguez Taverna | 6 | 7$^9$ | | | | | | | | | |
| | E Donskoy | 3 | 3 | | 6 | M Bellucci | 3 | 6$^7$ | | | | | | | | | |
| 6 | M Bellucci | 6 | 6 | | | | | | | | | | | 1 | F Passaro | 6$^6$ | 3 |
| 3 | V Kopřiva | 0 | 5 | | | | | | | | | | | Alt | F Comesaña | 7$^8$ | 6 |
| | A Collarini | 6 | 7 | | | A Collarini | 3 | 5 | | | | | | | | | |
| Alt | M Pucinelli de Almeida | 6 | 7 | | Alt | M Pucinelli de Almeida | 6 | 7 | | | | | | | | | |
| | F Maestrelli | 2 | 5 | | | | | | | Alt | M Pucinelli de Almeida | 2 | 2 | | | | |
| | J Sousa | 2 | 6$^4$ | | | | | | | Alt | F Comesaña | 6 | 6 | | | | |
| Q | V Sachko | 6 | 7$^7$ | | Q | V Sachko | 3 | 6 | 3 | | | | | | | | |
| Alt | F Comesaña | 6 | 7$^7$ | | Alt | F Comesaña | 6 | 2 | 6 | | | | | | | | |
| 7 | K Coppejans | 3 | 6$^4$ | | | | | | | | | | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | F Agamenone | 6$^3$ | 2 | | | | | | | | | | | | | | |
| Q | RA Burruchaga | 7$^7$ | 6 | | Q | RA Burruchaga | 6 | 6$^2$ | 7$^7$ | | | | | | | | |
| Q | F Gaio | 3 | 4 | | | M Navone | 4 | 7$^7$ | 6$^1$ | | | | | | | | |
| | M Navone | 6 | 6 | | | | | | | Q | RA Burruchaga | 6 | 6 | | | | |
| WC | L Rottoli | 3 | 1 | | | | | | | Q | N Serdarušić | 3 | 3 | | | | |
| | M Trungelliti | 6 | 6 | | | M Trungelliti | 4 | 1$^r$ | | | | | | | | | |
| Q | N Serdarušić | 6 | 6 | | Q | N Serdarušić | 6 | 3 | | | | | | | | | |
| 4 | R Bonadio | 3 | 0 | | | | | | | | | | | Q | RA Burruchaga | 3 | 0 |
| 8 | S Shimabukuro | 3 | 3 | | | | | | | | | | | | P Llamas Ruiz | 6 | 6 |
| | P Llamas Ruiz | 6 | 6 | | | P Llamas Ruiz | 4 | 6 | 6 | | | | | | | | |
| Q | S Travaglia | 6 | 6 | | Q | S Travaglia | 6 | 1 | 2 | | | | | | | | |
| WC | Gabriele Piraino | 0 | 3 | | | | | | | | P Llamas Ruiz | 6 | 6 | | | | |
| | D Svrčina | 6 | 6 | | | | | | | 2/WC | L Nardi | 3 | 4 | | | | |
| | R Noguchi | 4 | 3 | | | D Svrčina | 6 | 6$^5$ | 2 | | | | | | | | |
| | L Darderi | 6 | 1 | 3 | 2/WC | L Nardi | 3 | 7$^7$ | 6 | | | | | | | | |
| 2/WC | L Nardi | 1 | 6 | 6 | | | | | | | | | | | | | |