# 2023 JC Ferrero Challenger Open – Singles

Lukáš Klein was the defending champion but lost in the second round to Maximilian Marterer.
Constant Lestienne won the title after defeating Hugo Grenier 6–7$^{(10–12)}$, 6–2, 6–4 in the final.

## Seeds

* Constant Lestienne (champion)
* Alex Molčan (first round)
* Pedro Martínez (second round)
* Benoît Paire (second round)
* Arthur Cazaux (second round)
* Maximilian Marterer (semifinals)
* Thiago Agustín Tirante (first round)
* Mattia Bellucci (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 | Semifinals | Final | Final | Final | Final | Final |
| 1 | Constant Lestienne | 7$^7$ | 6 | | | | | | |
| 6 | Maximilian Marterer | 6$^3$ | 4 | | | | | | |
| 6 | Maximilian Marterer | 6$^3$ | 4 | | 1 | Constant Lestienne | 6$^{10}$ | 6 | 6 |
| | | | | | | Hugo Grenier | 7$^{12}$ | 2 | 4 |
| | Hugo Grenier | 4 | 6 | 6 | | Hugo Grenier | 7$^{12}$ | 2 | 4 |
| | Dennis Novak | 6 | 4 | 3 | | | | | |

### 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 | C Lestienne | 6 | 7 | | | | | | | | | | | | | | |
| | F Gaio | 1 | 5 | | 1 | C Lestienne | 6 | 6 | | | | | | | | | |
| WC | Diego Augusto Barreto Sánchez | 4 | 3 | | | Em Nava | 1 | 1 | | | | | | | | | |
| | Em Nava | 6 | 6 | | | | | | | 1 | C Lestienne | 6 | 7$^7$ | | | | |
| | F Maestrelli | 4 | 6 | 4 | | | | | | WC | M Landaluce | 3 | 6$^5$ | | | | |
| WC | M Landaluce | 6 | 4 | 6 | WC | M Landaluce | 4 | 6 | 6 | | | | | | | | |
| | R Brancaccio | 2 | 1 | | 5 | A Cazaux | 6 | 2 | 3 | | | | | | | | |
| 5 | A Cazaux | 6 | 6 | | | | | | | | | | | 1 | C Lestienne | 7$^7$ | 6 |
| 4 | B Paire | 6 | 6 | | | | | | | | | | | 6 | M Marterer | 6$^3$ | 4 |
| Q | D Cukierman | 4 | 1 | | 4 | B Paire | 2 | 3 | | | | | | | | | |
| Q | M Damm | 6 | 7$^7$ | | Q | M Damm | 6 | 6 | | | | | | | | | |
| Q | A Barroso Campos | 4 | 6$^5$ | | | | | | | Q | M Damm | 5 | 5 | | | | |
| | L Klein | 6 | 6 | | | | | | | 6 | M Marterer | 7 | 7 | | | | |
| LL | D Cox | 3 | 2 | | | L Klein | 3 | 5 | | | | | | | | | |
| | A Moro Cañas | 4 | 4 | | 6 | M Marterer | 6 | 7 | | | | | | | | | |
| 6 | M Marterer | 6 | 6 | | | | | | | | | | | | | | |

### 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 |
| 7 | TA Tirante | 4 | 4 | | | | | | | | | | | | | | |
| Q | M Echargui | 6 | 6 | | Q | M Echargui | 4 | 4 | | | | | | | | | |
| | M Neuchrist | 4 | 3 | | | H Grenier | 6 | 6 | | | | | | | | | |
| | H Grenier | 6 | 6 | | | | | | | | H Grenier | 6 | 6 | | | | |
| Q | B Harris | 6 | 6$^5$ | 6 | | | | | | Q | B Harris | 3 | 4 | | | | |
| | A Çelikbilek | 2 | 7$^7$ | 1 | Q | B Harris | 6 | 6 | | | | | | | | | |
| | P Carreño Busta | 3 | 5 | | 3 | P Martínez | 1 | 2 | | | | | | | | | |
| 3 | P Martínez | 6 | 7 | | | | | | | | | | | H Grenier | 4 | 6 | 6 |
| 8 | M Bellucci | 6 | 7 | | | | | | | | | | | D Novak | 6 | 4 | 3 |
| Q | A Santillan | 4 | 5 | | 8 | M Bellucci | 6 | 6$^5$ | 3 | | | | | | | | |
| | A Andreev | 6 | 1 | 4 | | E Ymer | 3 | 7$^7$ | 6 | | | | | | | | |
| | E Ymer | 4 | 6 | 6 | | | | | | | E Ymer | 4 | 2 | | | | |
| | F Ferreira Silva | 6 | 6 | | | | | | | | D Novak | 6 | 6 | | | | |
| WC | D Blanch | 4 | 3 | | | F Ferreira Silva | 5 | 6$^7$ | | | | | | | | | |
| | D Novak | 6 | 6 | | | D Novak | 7 | 7$^9$ | | | | | | | | | |
| 2 | A Molčan | 1 | 3 | | | | | | | | | | | | | | |