# 2023 Maia Challenger – Singles

Luca Van Assche was the defending champion but chose not to defend his title.
Nuno Borges won the title after defeating Benoît Paire 6–1, 6–4 in the final.

## Seeds

* Nuno Borges (champion)
* Albert Ramos Viñolas (quarterfinals)
* Benoît Paire (final)
* Fabio Fognini (second round, withdrew)
* Elias Ymer (quarterfinals)
* Andrea Vavassori (quarterfinals)
* Calvin Hemery (first round)
* Riccardo Bonadio (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 |
| 1 | Nuno Borges | 7$^7$ | 6 | | | | |
| | Matteo Martineau | 6$^5$ | 4 | | | | |
| | Matteo Martineau | 6$^5$ | 4 | 1 | Nuno Borges | 6 | 6 |
| | | | | 3 | Benoît Paire | 1 | 4 |
| 3 | Benoît Paire | 6 | 7 | 3 | Benoît Paire | 1 | 4 |
| | Maxime Janvier | 2 | 5 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | N Borges | 6 | 7$^7$ | | | | | | | | | | | | | | |
| | M Safwat | 4 | 6$^5$ | | 1 | N Borges | 6 | 6 | | | | | | | | | |
| | M Geerts | 6$^3$ | 6 | 1 | | E Dalla Valle | 2 | 0 | | | | | | | | | |
| | E Dalla Valle | 7$^7$ | 4 | 6 | | | | | 1 | N Borges | 2 | 7$^8$ | 6 | | | | |
| | S Fanselow | 6 | 3 | 4 | | | | | 6 | A Vavassori | 6 | 6$^6$ | 3 | | | | |
| Q | K Friberg | 3 | 6 | 6 | Q | K Friberg | 2 | 3 | | | | | | | | | |
| Q | A Vatutin | 1 | 6$^6$ | | 6 | A Vavassori | 6 | 6 | | | | | | | | | |
| 6 | A Vavassori | 6 | 7$^8$ | | | | | | | | | | | 1 | N Borges | 7$^7$ | 6 |
| 4 | F Fognini | 6$^7$ | 6 | 7 | | | | | | | | | | | M Martineau | 6$^5$ | 4 |
| Q | Tom Gentzsch | 7$^9$ | 3 | 5 | 4 | F Fognini | | | | | | | | | | | |
| | M Martineau | 6 | 6 | | | M Martineau | w/o | | | | | | | | | | |
| LL | Miguel Damas | 1 | 2 | | | | | | | M Martineau | 6 | 6 | | | | | |
| | A Giannessi | 4 | 7$^7$ | 2 | | | | | Q | A Matusevich | 2 | 2 | | | | | |
| | H Rocha | 6 | 6$^5$ | 6 | | H Rocha | 6$^2$ | 4 | | | | | | | | | |
| Q | A Matusevich | 4 | 6 | 6 | Q | A Matusevich | 7$^7$ | 6 | | | | | | | | | |
| 7 | C Hemery | 6 | 3 | 3 | | | | | | | | | | | | | |

### 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 |
| 5 | E Ymer | 6$^3$ | 6 | 6 | | | | | | | | | | | | | | |
| | M Trungelliti | 7$^7$ | 2 | 4 | 5 | E Ymer | 6 | 6$^7$ | 6 | | | | | | | | | |
| | D Yevseyev | 6 | 7$^7$ | | | D Yevseyev | 4 | 7$^9$ | 3 | | | | | | | | | |
| LL | S Sakellaridis | 2 | 6$^5$ | | | | | | | 5 | E Ymer | 6 | 3 | 3 | | | | |
| Q | Pedro Araújo | 2 | 3 | | | | | | | 3 | B Paire | 3 | 6 | 6 | | | | |
| WC | J Faria | 6 | 6 | | WC | J Faria | 7$^9$ | 3 | 3 | | | | | | | | | |
| WC | D Vale | 2 | 4 | | 3 | B Paire | 6$^7$ | 6 | 6 | | | | | | | | | |
| 3 | B Paire | 6 | 6 | | | | | | | | | | | | 3 | B Paire | 6 | 7 |
| 8 | R Bonadio | 3 | 3 | | | | | | | | | | | | | M Janvier | 2 | 5 |
| WC | Francisco Rocha | 6 | 6 | | WC | F Rocha | 4 | 2 | | | | | | | | | | |
| Q | Andrea Guerrieri | 3 | 2 | | | M Janvier | 6 | 6 | | | | | | | | | | |
| | M Janvier | 6 | 6 | | | | | | | | M Janvier | 6 | 6 | | | | | |
| | J Sousa | 6 | 3 | 6 | | | | | | 2 | A Ramos Viñolas | 2 | 4 | | | | | |
| | FC Jianu | 3 | 6 | 1 | | J Sousa | 4 | 6$^3$ | | | | | | | | | | |
| | J Kovalík | 4 | 3 | | 2 | A Ramos Viñolas | 6 | 7$^7$ | | | | | | | | | | |
| 2 | A Ramos Viñolas | 6 | 6 | | | | | | | | | | | | | | | |