# 2017 International Challenger Zhangjiagang – Singles

This was the first edition of the tournament.
Jason Jung won the title after defeating Zhang Ze 6–4, 2–6, 6–4 in the final.

## Seeds

* Henri Laaksonen (first round, retired)
* Go Soeda (semifinals)
* Lee Duck-hee (first round)
* Yasutaka Uchiyama (quarterfinals)
* Hiroki Moriya (semifinals)
* Mohamed Safwat (quarterfinals)
* Wu Di (quarterfinals)
* Chen Ti (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 |
| | Zhang Ze | 6 | 6 | | | | | |
| 5 | Hiroki Moriya | 3 | 1 | | | | | |
| 5 | Hiroki Moriya | 3 | 1 | | Zhang Ze | 4 | 6 | 4 |
| | | | | | Jason Jung | 6 | 2 | 6 |
| | Jason Jung | 7$^7$ | 3 | 7$^7$ | Jason Jung | 6 | 2 | 6 |
| 2 | Go Soeda | 6$^2$ | 6 | 6$^5$ | | | | |

### 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/Alt | H Laaksonen | 7$^7$ | 2 | 0$^r$ | | | | | | | | | | | | | |
| | A Bega | 6$^2$ | 6 | 2 | | A Bega | 2 | 4 | | | | | | | | | |
| | V Vardhan | 1 | 1 | | | Ze Zhang | 6 | 6 | | | | | | | | | |
| | Ze Zhang | 6 | 6 | | | | | | | | Ze Zhang | 7 | 6 | | | | |
| | Shuichi Sekiguchi | 6 | 6 | | | | | | | 6 | M Safwat | 5 | 3 | | | | |
| | K Takeuchi | 4 | 3 | | | S Sekiguchi | 7$^7$ | 1 | 3 | | | | | | | | |
| WC | C Wang | 4 | 2 | | 6 | M Safwat | 6$^5$ | 6 | 6 | | | | | | | | |
| 6 | M Safwat | 6 | 6 | | | | | | | | | | | | Ze Zhang | 6 | 6 |
| 4 | Y Uchiyama | 6 | 6 | | | | | | | | | | | 5 | H Moriya | 3 | 1 |
| WC | Zh Zhang | 2 | 1 | | 4 | Y Uchiyama | 6 | 6 | | | | | | | | | |
| | Kim Cheong-eui | 7 | 6 | | | C-e Kim | 3 | 1 | | | | | | | | | |
| | L Saville | 5 | 4 | | | | | | | 4 | Y Uchiyama | 3 | 5 | | | | |
| WC | F Sun | 3 | 2 | | | | | | | 5 | H Moriya | 6 | 7 | | | | |
| | M Bachinger | 6 | 6 | | | M Bachinger | 6 | 4 | 0 | | | | | | | | |
| Q | Miliaan Niesten | 3 | 6 | 4 | 5 | H Moriya | 4 | 6 | 6 | | | | | | | | |
| 5 | H Moriya | 6 | 4 | 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 | Semifinals |
| 7 | D Wu | 6 | 6 | | | | | | | | | | | | | | | |
| | E Karlovskiy | 3 | 3 | | 7 | D Wu | 6 | 6 | | | | | | | | | | |
| | A Kudryavtsev | 7$^7$ | 6$^5$ | 6 | | A Kudryavtsev | 4 | 3 | | | | | | | | | | |
| Q | M Matosevic | 6$^4$ | 7$^7$ | 2 | | | | | | 7 | D Wu | 6$^7$ | 3 | | | | | |
| WC | X Gao | 6 | 3 | 0 | | | | | | | J Jung | 7$^9$ | 6 | | | | | |
| | D Kelly | 3 | 6 | 6 | | D Kelly | 6 | 2 | 1 | | | | | | | | | |
| | J Jung | 6 | 6 | | | J Jung | 3 | 6 | 6 | | | | | | | | | |
| 3 | D-h Lee | 4 | 1 | | | | | | | | | | | | J Jung | 7$^7$ | 3 | 7$^7$ |
| 8 | T Chen | 5 | 3 | | | | | | | | | | | 2 | G Soeda | 6$^2$ | 6 | 6$^5$ |
| Q | B Mousley | 7 | 6 | | Q | B Mousley | 4 | 7$^7$ | 6$^4$ | | | | | | | | | |
| | Y Takahashi | 7 | 6 | | | Y Takahashi | 6 | 6$^3$ | 7$^7$ | | | | | | | | | |
| | T Niki | 5 | 1 | | | | | | | | Y Takahashi | 2 | 0 | | | | | |
| | Lorenzo Frigerio | 7$^7$ | 6 | | | | | | | 2 | G Soeda | 6 | 6 | | | | | |
| Q | Yuya Kibi | 6$^5$ | 4 | | | L Frigerio | 1 | 4 | | | | | | | | | | |
| | Z Li | 4 | 2 | | 2 | G Soeda | 6 | 6 | | | | | | | | | | |
| 2 | G Soeda | 6 | 6 | | | | | | | | | | | | | | | |