# 2023 Tenerife Challenger III – Singles

Matteo Arnaldi was the defending champion but chose not to defend his title.
Matteo Gigante won the title after defeating Stefano Travaglia 6–3, 6–2 in the final.

## Seeds

* Francesco Passaro (second round)
* Alexander Shevchenko (first round)
* Filip Misolic (first round, retired)
* Raúl Brancaccio (second round)
* Ryan Peniston (semifinals)
* Oleksii Krutykh (first round)
* Carlos Taberner (first round, retired)
* Francesco Maestrelli (quarterfinals)

## 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 |
| LL | Matteo Gigante | 5 | 7$^7$ | 6 | | | | |
| | Riccardo Bonadio | 7 | 6$^3$ | 3 | | | | |
| | Riccardo Bonadio | 7 | 6$^3$ | 3 | LL | Matteo Gigante | 6 | 6 |
| | | | | | WC | Stefano Travaglia | 3 | 2 |
| WC | Stefano Travaglia | 7$^7$ | 2 | 6 | WC | Stefano Travaglia | 3 | 2 |
| 5 | Ryan Peniston | 6$^4$ | 6 | 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | F Passaro | 6 | 6 | | | | | | | | | | | | | | | |
| Q | S Mochizuki | 3 | 4 | | 1 | F Passaro | 7 | 2 | 2 | | | | | | | | | |
| LL | M Gigante | 6 | 6 | | LL | M Gigante | 5 | 6 | 6 | | | | | | | | | |
| WC | D Rincón | 4 | 2 | | | | | | | LL | M Gigante | 6 | 6 | | | | | |
| | M Landaluce | 3 | 6 | 6$^4$ | | | | | | WC | P Llamas Ruiz | 2 | 4 | | | | | |
| | S Rodríguez Taverna | 6 | 2 | 7$^7$ | | S Rodríguez Taverna | 2 | 1$^r$ | | | | | | | | | | |
| WC | P Llamas Ruiz | 3 | | | WC | P Llamas Ruiz | 6 | 3 | | | | | | | | | | |
| 7 | C Taberner | 0$^r$ | | | | | | | | | | | | LL | M Gigante | 5 | 7$^7$ | 6 |
| 3 | F Misolic | 6$^2$ | 0$^r$ | | | | | | | | | | | | R Bonadio | 7 | 6$^3$ | 3 |
| | R Bonadio | 7$^7$ | 4 | | | R Bonadio | 6 | 7$^7$ | | | | | | | | | | |
| | K Coppejans | 6 | 3 | 5 | | N Moreno de Alboran | 3 | 6$^5$ | | | | | | | | | | |
| | N Moreno de Alboran | 3 | 6 | 7 | | | | | | | R Bonadio | 7 | 6 | | | | | |
| LL | GM Moroni | 3 | 2 | | | | | | | 8 | F Maestrelli | 5 | 2 | | | | | |
| Alt | G Mager | 6 | 6 | | Alt | G Mager | 7$^{11}$ | 3 | 4 | | | | | | | | | |
| | L Rosol | 3 | 1 | | 8 | F Maestrelli | 6$^9$ | 6 | 6 | | | | | | | | | |
| 8 | F Maestrelli | 6 | 6 | | | | | | | | | | | | | | | |

### 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 | Semifinals |
| 6 | O Krutykh | 2 | 2 | | | | | | | | | | | | | | |
| WC | S Travaglia | 6 | 6 | | WC | S Travaglia | 6 | 6 | | | | | | | | | |
| LL | Oscar José Gutierrez | 1 | 6 | 6 | LL | OJ Gutierrez | 0 | 0 | | | | | | | | | |
| Alt | M Gengel | 6 | 0 | 3 | | | | | WC | S Travaglia | 6 | 6 | | | | | |
| | A Giannessi | 6 | 0 | 6 | | | | | | A Giannessi | 3 | 4 | | | | | |
| | M Kukushkin | 4 | 6 | 3 | | A Giannessi | 6 | 6 | | | | | | | | | |
| | Y Demin | 1 | 2 | | 4 | R Brancaccio | 3 | 2 | | | | | | | | | |
| 4 | R Brancaccio | 6 | 6 | | | | | | | | | | WC | S Travaglia | 7$^7$ | 2 | 6 |
| 5 | R Peniston | 7 | 7 | | | | | | | | | | 5 | R Peniston | 6$^4$ | 6 | 2 |
| | D Svrčina | 5 | 5 | | 5 | R Peniston | 6 | 6 | | | | | | | | | |
| Q | A Shelbayh | 6 | 6 | | Q | A Shelbayh | 1 | 2 | | | | | | | | | |
| Q | S Caruso | 4 | 3 | | | | | | 5 | R Peniston | 7 | 6 | | | | | |
| Q | C Harrison | 5 | 4 | | | | | | Q | G Fonio | 5 | 2 | | | | | |
| Q | G Fonio | 7 | 6 | | Q | G Fonio | 7$^7$ | 6 | | | | | | | | | |
| Q | Y Bu | 3 | 6 | 7$^7$ | Q | Y Bu | 6$^5$ | 4 | | | | | | | | | |
| 2 | A Shevchenko | 6 | 1 | 6$^2$ | | | | | | | | | | | | | |