2025 International Challenger Zhangjiagang – Singles

Singles
2025 International Challenger Zhangjiagang
Champion	Sho Shimabukuro
Runner-up	Oliver Crawford
Score	6–3, 3–6, 7–5

Yasutaka Uchiyama was the defending champion^[1] but lost in the semifinals to Sho Shimabukuro.

Shimabukuro won the title after defeating Oliver Crawford 6–3, 3–6, 7–5 in the final.^[2]

Key

	Semifinals							Final
	6	Oliver Crawford	77	6
		Kokoro Isomura	61	0
								6	Oliver Crawford	3	6	5
								3	Sho Shimabukuro	6	3	7
	3	Sho Shimabukuro	6	77
	5	Yasutaka Uchiyama	3	65

	First round							Second round							Quarterfinals							Semifinals
	1	B Tomic	1	6	66
	PR	P Sekulic	6	1	78			PR	P Sekulic	4	4
		A Binda	7	3	3			Alt	R Tokuda	6	6
	Alt	Renta Tokuda	5	6	6										Alt	R Tokuda	61	6	2
		D Yevseyev	2	6	4										6	O Crawford	77	3	6
		H Moriya	6	4	6				H Moriya	3	6	4
		M Imamura	3	2				6	O Crawford	6	4	6
	6	O Crawford	6	6																		6	O Crawford	77	6
	4	F Sun	3	6	6																		K Isomura	61	0
	WC	Y Mo	6	3	4			4	F Sun	3	1
		Shin San-hui	7	77					S-h Shin	6	6
		Shin Woo-bin	5	64												S-h Shin	6	2	4
	Alt	S Fomin	3	2												K Isomura	2	6	6
		K Isomura	6	6					K Isomura	3	6	711
		J Cui	5	77	6				J Cui	6	2	69
	8	A Géa	7	64	0

	First round							Second round							Quarterfinals							Semifinals
	7	I Simakin	6	77
		T-l Wu	4	61				7	I Simakin	6	6
	Q	J Charlton	6	67	6			Q	J Charlton	4	4
	WC	R Te	4	79	4										7	I Simakin	4	3
	Q	F Peliwo	6	6											3	S Shimabukuro	6	6
		P Bar Biryukov	1	2				Q	F Peliwo	3	4
	LL	J Watt	4	6	2			3	S Shimabukuro	6	6
	3	S Shimabukuro	6	3	6																	3	S Shimabukuro	6	77
	5	Y Uchiyama	6	5	6																	5	Y Uchiyama	3	65
	Q	Yuta Kikuchi	2	7	1			5	Y Uchiyama	6	6
	Q	K Uesugi	1	77	2r			Q	T-h Huang	2	4
	Q	T-h Huang	6	64	3										5	Y Uchiyama	6	6
	Alt	L Castelnuovo	64	3											Q	K Uchida	3	4
	Q	K Uchida	77	6				Q	K Uchida	6	77
	WC	Xiao Linang	66	1				2	R Noguchi	1	64
	2	R Noguchi	78	6

• Main draw
• Qualifying draw