Singles
2019 International Challenger Zhangjiagang
Champion	Marc Polmans
Runner-up	Lorenzo Giustino
Score	6–4, 4–6, 7–6(7–4)

Yasutaka Uchiyama was the defending champion but chose not to defend his title.^[1]

Marc Polmans won the title after defeating Lorenzo Giustino 6–4, 4–6, 7–6^(7–4) in the final.

Seeds

All seeds receive a bye into the second round.

Draw

Finals

	Quarterfinals							Semifinals							Final
	17	Uladzimir Ignatik	4	2
	11	Viktor Galović	6	6
								11	Viktor Galović
								6	Lorenzo Giustino	w/o
	3	Kwon Soon-woo	3	2
	6	Lorenzo Giustino	6	6
															6	Lorenzo Giustino	4	6	64
															10	Marc Polmans	6	4	77
	8	Zhang Ze	4	2
	15	Mathias Bourgue	6	6
								15	Mathias Bourgue	2	6	3
								10	Marc Polmans	6	4	6
	10	Marc Polmans	6	7
	13	Stefano Napolitano	3	5

Top half

Section 1

	First round							Second round							Third round							Quarterfinals
								1	B Schnur	4	77	66
		A Harris	6	6					A Harris	6	62	78
	WC	Y He	1	1												A Harris	2	5
		Y Wu	2	6	2										17	U Ignatik	6	7
		G Oliveira	6	2	6				G Oliveira	3	2
								17	U Ignatik	6	6
																						17	U Ignatik	4	2
																						11	V Galović	6	6
								11	V Galović	6	6
	WC	X Gao	5	4					D Wu	1	4
		D Wu	7	6											11	V Galović	6	6
		Y-s Chung	6	6												Y-s Chung	3	2
	Q	F Sun	4	4					Y-s Chung	4	7	6
								5	Y Sugita	6	5	2

Section 2

	First round							Second round							Third round							Quarterfinals
								3	S-w Kwon	78	6
		G Clezar	77	6					G Clezar	66	3
	Q	H Heliövaara	61	3											3	S-w Kwon	6	6
		E Karlovskiy	6	7											14	F Peliwo	4	2
	ITF	Kim Cheong-eui	2	5					E Karlovskiy	1	4
								14	F Peliwo	6	6
																						3	S-w Kwon	3	2
																						6	L Giustino	6	6
								9	G Soeda	6	64	1
		A Santillan	2	1r					M Purcell	4	77	6
		M Purcell	6	2												M Purcell	3	4
		M Banes	4	3											6	L Giustino	6	6
	PR	D Nguyen	6	6				PR	D Nguyen	0	3
								6	L Giustino	6	6

Bottom half

Section 3

	First round							Second round							Third round							Quarterfinals
								8	Ze Zhang	6	77
		T-h Yang	4	2				ITF	K-M Maamoun	0	63
	ITF	K-M Maamoun	6	6											8	Ze Zhang	6	2	6
		L Saville	7	3	6											L Saville	4	6	4
		Renta Tokuda	5	6	3				L Saville	6	6
								12	M Safwat	4	2
																						8	Ze Zhang	4	2
																						15	M Bourgue	6	6
								15	M Bourgue	7	6
	ITF	Baptiste Crepatte	2	1					S Mukund	5	4
		S Mukund	6	6											15	M Bourgue	7	4	6
		N Serdarušić	61	6	2										4	H Moriya	5	6	1
		A Molčan	77	4	6				A Molčan	65	63
								4	H Moriya	77	77

Section 4

	First round							Second round							Third round							Quarterfinals
								7	B Rola	6	6
	WC	R Hua	4	3				WC	Zh Zhang	2	4
	WC	Zh Zhang	6	6											7	B Rola	3	65
		Z Li	6	3	4										10	M Polmans	6	77
		J Hernández-Fernández	1	6	6				J Hernández-Fernández	3	3
								10	M Polmans	6	6
																						10	M Polmans	6	7
																						13	S Napolitano	3	5
								13	S Napolitano	2	6	6
	ITF	I Gakhov	6	1	4			Alt	M Ochi	6	3	4
	Alt	Makoto Ochi	3	6	6										13	S Napolitano	6	3	7
	WC	Xia Zihao	1	77	6										2	J Duckworth	4	6	5
		TK Wang	6	61	3			WC	Z Xia	0	3
								2	J Duckworth	6	6

References

External links

• Main draw
• Qualifying draw