2019 International Challenger Zhangjiagang

The 2019 International Challenger Zhangjiagang was a professional tennis tournament played on hard courts. It was the third edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Zhangjiagang, China between 18 and 24 March 2019.

Seeds

 * 1 Rankings are as of 4 March 2019.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇨🇳 Gao Xin
 * 🇨🇳 He Yecong
 * 🇨🇳 Hua Runhao
 * 🇨🇳 Xia Zihao
 * 🇨🇳 Zhang Zhizhen

The following player received entry into the singles main draw using a protected ranking:
 * 🇺🇸 Daniel Nguyen

The following player received entry into the singles main draw as an alternate:
 * 🇯🇵 Makoto Ochi

The following players received entry into the singles main draw using their ITF World Tennis Ranking:
 * 🇫🇷 Baptiste Crepatte
 * 🇷🇺 Ivan Gakhov
 * 🇰🇷 Kim Cheong-eui
 * 🇪🇬 Karim-Mohamed Maamoun

The following players received entry from the qualifying draw:
 * 🇫🇮 Harri Heliövaara
 * 🇨🇳 Sun Fajing

Singles

 * 🇦🇺 Marc Polmans def. 🇮🇹 Lorenzo Giustino 6–4, 4–6, 7–6(7–4).

Doubles

 * 🇦🇺 Max Purcell / 🇦🇺 Luke Saville def. 🇮🇳 Sriram Balaji / 🇲🇽 Hans Hach Verdugo 6–2, 7–6(7–5).