The 2025 International Challenger Zhangjiagang was a professional tennis tournament played on hard courts. It was the sixth edition of the tournament which was part of the 2025 ATP Challenger Tour. It took place in Zhangjiagang, China between 25 August and 1 September 2025.
Singles main-draw entrants
Seeds Country Player Rank1 SeedBernard Tomic1691Rio Noguchi1962Sho Shimabukuro2013Sun Fajing2154Yasutaka Uchiyama2275Oliver Crawford2326Ilia Simakin2387Arthur Géa2578 1 Rankings are as of 18 August 2025.
Other entrants The following players received wildcards into the singles main draw: Mo Yecong Te Rigele Xiao Linang
The following player received entry into the singles main draw using a protected ranking: Philip Sekulic
The following players received entry into the singles main draw as alternates: Luca Castelnuovo Sergey Fomin Renta Tokuda
The following players received entry from the qualifying draw: Joshua Charlton Huang Tsung-hao Yuta Kikuchi Filip Peliwo Kaichi Uchida Kaito Uesugi
The following player received entry as a lucky loser: James Watt
Champions
Singles
Sho Shimabukuro def. Oliver Crawford 6–3, 3–6, 7–5.
Doubles
Luca Castelnuovo / Akira Santillan def. Petr Bar Biryukov / Alexandr Binda 6–3, 6–7(8–10), [10–3].
References