title: 2017 International Challenger Zhangjiagang – Singles
text: # 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 | | | | | | | | | | | | | | | |
  