Singles
2019 OEC Kaohsiung
Champion	John Millman
Runner-up	Marc Polmans
Score	6–4, 6–2

The 2019 OEC Kaohsiung-Singles was a men's tennis tournament held from September 16 to September 22, 2019, at Kaohsiung, Taiwan. Gaël Monfils was the defending champion^[1] but chose not to defend his title.

John Millman won the title after defeating Marc Polmans 6–4, 6–2 in the final.

Seeds

All seeds receive a bye into the second round.

Draw

Finals

	Quarterfinals							Semifinals							Final
		Frederico Ferreira Silva	6	78
	9	Alex Bolt	4	66
									Frederico Ferreira Silva	1	7	5
								10	Marc Polmans	6	5	7
		Nam Ji-sung	6	1	4
	10	Marc Polmans	3	6	6
															10	Marc Polmans	4	2
															3	John Millman	6	6
	5	Jiří Veselý	65	1
	3	John Millman	77	6
								3	John Millman	2	6	6
								12	Steven Diez	6	3	2
	12	Steven Diez	6	78
	14	Enrique López Pérez	3	66

Top half

Section 1

	First round							Second round							Third round							Quarterfinals
								1	K Majchrzak	6	6
		H Bourchier	3	6	6				H Bourchier	4	4
	Q	Y Takahashi	6	1	2										1	K Majchrzak	63	5
		T-l Wu	63	3												F Ferreira Silva	77	7
		F Ferreira Silva	77	6					F Ferreira Silva	78	1	6
								15	Yo Watanuki	66	6	3
																							F Ferreira Silva	6	78
																						9	A Bolt	4	66
								9	A Bolt	7	6
		Y-s Chung	4	3				PR	M Niesten	5	4
	PR	Miliaan Niesten	6	6											9	A Bolt	7	4	78
		Shintaro Imai	3	4											6	J Jung	5	6	66
		Renta Tokuda	6	6					R Tokuda	2	3
								6	J Jung	6	6

Section 2

	First round							Second round							Third round							Quarterfinals
								LL	Tsai Chang-lin	4	1
		J-s Nam	4	6	3				J-s Nam	6	6
	WC	C-y Yu	6	2	1r											J-s Nam	6	6
	WC	C-p Hsieh	2	2											13	A Harris	2	2
		T-h Yang	6	6					T-h Yang	66	3
								13	A Harris	78	6
																							J-s Nam	6	1	4
																						10	M Polmans	3	6	6
								10	M Polmans	6	6
		S Mukund	710	3	78				S Mukund	4	1
		G Oliveira	68	6	66										10	M Polmans	1	711	6
	LL	K-y Lee	2	3											7	G Soeda	6	69	3
		C-h Tseng	6	6					C-h Tseng	2	3
								7	G Soeda	6	6

Bottom half

Section 3

	First round							Second round							Third round							Quarterfinals
								5	J Veselý	78	6
		T Gabashvili	6	5	6				T Gabashvili	66	1
		C Altamirano	3	7	4										5	J Veselý	7	6
		A Santillan	6	7											11	Y Uchiyama	5	2
	WC	Y-h Hsu	3	5					A Santillan	65	3
								11	Y Uchiyama	77	6
																						5	J Veselý	65	1
																						3	J Millman	77	6
								16	H Moriya	6	6
		J Ward	4	6	4				K Uchida	4	2
		K Uchida	6	0	6										16	H Moriya	2	62
		R Noguchi	6	6											3	J Millman	6	77
	WC	Lo Chien-hsun	2	2					R Noguchi	1	2
								3	J Millman	6	6

Section 4

	First round							Second round							Third round							Quarterfinals
								8	Y Sugita	77	4	6
		S Myneni	6	1	3				M Purcell	62	6	2
		M Purcell	3	6	6										8	Y Sugita	2	4
	Q	Jumpei Yamasaki	67	4											12	S Diez	6	6
		L Saville	79	6					L Saville	6	4	1
								12	S Diez	3	6	6
																						12	S Diez	6	78
																						14	E López Pérez	3	66
								14	E López Pérez	6	6
		Jacob Grills	4	6	2				E King	3	3
		E King	6	3	6										14	E López Pérez	5	7	6
	WC	R Ho	66	3											2	P Gunneswaran	7	5	4
		Shuichi Sekiguchi	78	6					S Sekiguchi	3	2
								2	P Gunneswaran	6	6

References

• Main draw
• Qualifying draw