2019 International Challenger Zhangjiagang – Singles

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

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

Main article: 2019 International Challenger Zhangjiagang

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.

1. Brayden Schnur (second round)
2. James Duckworth (third round)
3. Kwon Soon-woo (quarterfinals)
4. Hiroki Moriya (third round)
5. Yūichi Sugita (second round)
6. Lorenzo Giustino (final)
7. Blaž Rola (third round)
8. Zhang Ze (quarterfinals)
9. Go Soeda (second round)
10. Marc Polmans (champion)
11. Viktor Galović (semifinals, withdrew)
12. Mohamed Safwat (second round)
13. Stefano Napolitano (quarterfinals)
14. Filip Peliwo (third round)
15. Mathias Bourgue (semifinals)
16. Lee Duck-hee (withdrew)
17. Uladzimir Ignatik (quarterfinals)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• ITF = ITF entry
• PR = Protected ranking
• SR = Special ranking
• SE = Special exempt
• JE = Junior exempt
• JR = Junior Accelerator Programme entrant
• CO = College Accelerator Programme entrant
• NG = Next Gen Accelerator Program entrant
• w/o = Walkover
• r = Retired
• d = Defaulted

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