# 2023 Matsuyama Challenger – Singles

Hong Seong-chan was the defending champion but lost in the first round to Luca Nardi.
Nardi won the title after defeating Taro Daniel 3–6, 6–4, 6–2 in the final.

## Seeds

* Taro Daniel (final)
* Shintaro Mochizuki (second round)
* Luca Nardi (champion)
* Sho Shimabukuro (second round)
* Benjamin Hassan (quarterfinals)
* Marc Polmans (first round)
* Bu Yunchaokete (quarterfinals)
* Hsu Yu-hsiou (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 | Final | Final | Final | Final | Final |
| 1 | Taro Daniel | 7$^7$ | 6 | | | | | |
| Q | August Holmgren | 6$^5$ | 2 | | | | | |
| Q | August Holmgren | 6$^5$ | 2 | 1 | Taro Daniel | 6 | 4 | 2 |
| | | | | 3 | Luca Nardi | 3 | 6 | 6 |
| 3 | Luca Nardi | 6 | 6 | 3 | Luca Nardi | 3 | 6 | 6 |
| | Geoffrey Blancaneaux | 3 | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | T Daniel | 6 | 6 | | | | | | | | | | | | | | | |
| WC | Shunsuke Nakagawa | 1 | 2 | | 1 | T Daniel | 6 | 3 | 6 | | | | | | | | | |
| | M Echargui | 6 | 6 | | | M Echargui | 2 | 6 | 2 | | | | | | | | | |
| | A Weber | 0 | 3 | | | | | | | 1 | T Daniel | 6 | 3 | 7 | | | | |
| | J Jung | 4 | 6 | 4 | | | | | | 8 | Y-h Hsu | 2 | 6 | 5 | | | | |
| | Y Shimizu | 6 | 2 | 6 | | Y Shimizu | 4 | 3 | | | | | | | | | | |
| | Z Kolář | 2 | 3 | | 8 | Y-h Hsu | 6 | 6 | | | | | | | | | | |
| 8 | Y-h Hsu | 6 | 6 | | | | | | | | | | | | 1 | T Daniel | 7$^7$ | 6 |
| 4 | S Shimabukuro | 5 | 6 | 6 | | | | | | | | | | | Q | A Holmgren | 6$^5$ | 2 |
| | G Fonio | 7 | 4 | 4 | 4 | S Shimabukuro | 6$^3$ | 3 | | | | | | | | | | |
| | D Ajduković | 6 | 6 | | | D Ajduković | 7$^7$ | 6 | | | | | | | | | | |
| | K Uchida | 4 | 4 | | | | | | | | D Ajduković | 5 | 6 | 6$^5$ | | | | |
| | T-l Wu | 4 | 1 | | | | | | | Q | A Holmgren | 7 | 3 | 7$^7$ | | | | |
| WC | Y Uchiyama | 6 | 6 | | WC | Y Uchiyama | 6$^8$ | 6$^5$ | | | | | | | | | | |
| Q | A Holmgren | 6 | 6 | | Q | A Holmgren | 7$^{10}$ | 7$^7$ | | | | | | | | | | |
| 6 | M Polmans | 0 | 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 |
| 7 | Y Bu | 6$^4$ | 6 | 6 | | | | | | | | | | | | | |
| | M Efstathiou | 7$^7$ | 2 | 2 | 7 | Y Bu | 6 | 5 | 7 | | | | | | | | |
| Q | Z Li | 6 | 4 | 4 | | D Sweeny | 4 | 7 | 5 | | | | | | | | |
| | D Sweeny | 2 | 6 | 6 | | | | | | 7 | Y Bu | 5 | 3 | | | | |
| | F Ferreira Silva | 3 | 2 | | | | | | | 3 | L Nardi | 7 | 6 | | | | |
| | J McCabe | 6 | 6 | | | J McCabe | 4 | 4 | | | | | | | | | |
| | S-c Hong | 5 | 6 | 6$^4$ | 3 | L Nardi | 6 | 6 | | | | | | | | | |
| 3 | L Nardi | 7 | 3 | 7$^7$ | | | | | | | | | | 3 | L Nardi | 6 | 6 |
| 5 | B Hassan | 6 | 6 | | | | | | | | | | | | G Blancaneaux | 3 | 3 |
| Q | H Moriya | 4 | 4 | | 5 | B Hassan | 1 | 7$^7$ | 6 | | | | | | | | |
| Q | J Trotter | 4 | 3 | | Q | B Ellis | 6 | 6$^4$ | 3 | | | | | | | | |
| Q | B Ellis | 6 | 6 | | | | | | | 5 | B Hassan | 3 | 2 | | | | |
| WC | Sho Katayama | 0 | 4 | | | | | | | | G Blancaneaux | 6 | 6 | | | | |
| | G Blancaneaux | 6 | 6 | | | G Blancaneaux | 7 | 6 | | | | | | | | | |
| Q | N Nakagawa | 2 | 2 | | 2 | S Mochizuki | 5 | 3 | | | | | | | | | |
| 2 | S Mochizuki | 6 | 6 | | | | | | | | | | | | | | |