# 2024 International Challenger Zhangjiagang – Singles

Térence Atmane was the defending champion but chose not to defend his title.
Yasutaka Uchiyama won the title after defeating Mark Lajal 6–7$^{(4–7)}$, 6–2, 6–2 in the final.

## Seeds

* Coleman Wong (second round)
* Hong Seong-chan (semifinals, retired)
* Hsu Yu-hsiou (first round)
* Yasutaka Uchiyama (champion)
* Marc Polmans (first round)
* Beibit Zhukayev (second round)
* Mark Lajal (final)
* Egor Gerasimov (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 | Semifinals | Final | Final | Final | Final | Final |
| Q | Norbert Gombos | 3 | 4 | | | | | | |
| 7 | Mark Lajal | 6 | 6 | | | | | | |
| 7 | Mark Lajal | 6 | 6 | | 7 | Mark Lajal | 7$^7$ | 2 | 2 |
| | | | | | 4 | Yasutaka Uchiyama | 6$^4$ | 6 | 6 |
| 4 | Yasutaka Uchiyama | 6 | 6$^6$ | 4 | 4 | Yasutaka Uchiyama | 6$^4$ | 6 | 6 |
| 2 | Hong Seong-chan | 3 | 7$^8$ | 0$^r$ | | | | | |

### 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 Wong | 6 | 5 | 6 | | | | | | | | | | | | | |
| Q | E Agafonov | 3 | 7 | 4 | 1 | C Wong | 2 | 6$^3$ | | | | | | | | | |
| Q | N Gombos | 7 | 5 | 6 | Q | N Gombos | 6 | 7$^7$ | | | | | | | | | |
| WC | Y Wu | 5 | 7 | 1 | | | | | | Q | N Gombos | w/o | | | | | |
| | T Lamasine | 2 | 6$^2$ | | | | | | | | D Svrčina | | | | | | |
| | D Svrčina | 6 | 7$^7$ | | | D Svrčina | 6 | 6 | | | | | | | | | |
| Q | Y Takahashi | 7 | 6 | | Q | Y Takahashi | 2 | 1 | | | | | | | | | |
| 5 | M Polmans | 5 | 3 | | | | | | | | | | | Q | N Gombos | 3 | 4 |
| 3 | Y-h Hsu | 4 | 4 | | | | | | | | | | | 7 | M Lajal | 6 | 6 |
| | J Cui | 6 | 6 | | | J Cui | 6 | 3 | 1 | | | | | | | | |
| | R Noguchi | 6 | 6 | | | R Noguchi | 0 | 6 | 6 | | | | | | | | |
| | Mikalai Haliak | 3 | 3 | | | | | | | | R Noguchi | 4 | 2 | | | | |
| Q | Kris van Wyk | 4 | 4 | | | | | | | 7 | M Lajal | 6 | 6 | | | | |
| | R Peniston | 6 | 6 | | | R Peniston | 2 | 2 | | | | | | | | | |
| Alt | P Henning | 6 | 5 | 6$^5$ | 7 | M Lajal | 6 | 6 | | | | | | | | | |
| 7 | M Lajal | 4 | 7 | 7$^7$ | | | | | | | | | | | | | |

### 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 | Semifinals |
| 6 | B Zhukayev | 7 | 7 | | | | | | | | | | | | | | | | |
| Q | Lukáš Pokorný | 5 | 5 | | 6 | B Zhukayev | 7 | 2 | 5 | | | | | | | | | | |
| WC | Y Zhou | 2 | 1 | | | T-l Wu | 5 | 6 | 7 | | | | | | | | | | |
| | T-l Wu | 6 | 6 | | | | | | | | T-l Wu | 7$^7$ | 3 | 4 | | | | | |
| | Vadym Ursu | 6 | 7 | | | | | | | 4 | Y Uchiyama | 6$^5$ | 6 | 6 | | | | | |
| Q | A Rai | 2 | 5 | | | V Ursu | 2 | 1 | | | | | | | | | | | |
| | Y Shimizu | 2 | 0$^r$ | | 4 | Y Uchiyama | 6 | 6 | | | | | | | | | | | |
| 4 | Y Uchiyama | 6 | 1 | | | | | | | | | | | | 4 | Y Uchiyama | 6 | 6$^6$ | 4 |
| 8 | E Gerasimov | 6$^5$ | 3 | | | | | | | | | | | | 2 | S-c Hong | 3 | 7$^8$ | 0$^r$ |
| WC | S Tang | 7$^7$ | 6 | | WC | S Tang | 4 | 4 | | | | | | | | | | | |
| | K Uchida | 3 | 7$^7$ | 0 | | F Sun | 6 | 6 | | | | | | | | | | | |
| | F Sun | 6 | 6$^5$ | 6 | | | | | | | F Sun | 7 | 2 | 2 | | | | | |
| | Y Bai | 6 | 1 | 6 | | | | | | 2 | S-c Hong | 5 | 6 | 6 | | | | | |
| | B Mott | 4 | 6 | 3 | | Y Bai | 2 | 1 | | | | | | | | | | | |
| LL | E Donskoy | 6 | 6$^1$ | 2 | 2 | S-c Hong | 6 | 6 | | | | | | | | | | | |
| 2 | S-c Hong | 4 | 7$^7$ | 6 | | | | | | | | | | | | | | | |