2023 International Challenger Zhangjiagang

Country	Player	Rank1	Seed
CHN	Bu Yunchaokete	215	1
FRA	Térence Atmane	218	2
JPN	Kaichi Uchida	240	3
JPN	Rio Noguchi	251	4
AUS	Li Tu	255	5
TPE	Jason Jung	256	6
LTU	Ričardas Berankis	257	7
AUS	James McCabe	281	8

• ¹ Rankings are as of 21 August 2023.^[1]

The following players received wildcards into the singles main draw:

• Li Hanwen
• Sun Fajing
• Te Rigele

The following players received entry into the singles main draw as alternates:

• Alafia Ayeni
• Rubin Statham

The following players received entry from the qualifying draw:

• Bai Yan
• Cui Jie
• Mikalai Haliak
• Liu Hanyi
• Leonid Sheyngezikht
• Xiao Linang

The following players received entry as lucky losers:

• Colin Sinclair
• Yusuke Takahashi

• Térence Atmane def. Mikalai Haliak 6–1, 6–2.

• Ray Ho / Matthew Romios def. Francis Alcantara / Sun Fajing 6–3, 6–4.