Singles
2018 OEC Kaohsiung
Final
Champion	Gaël Monfils
Runner-up	Kwon Soon-woo
Score	6–4, 2–6, 6–1
Events
Singles Doubles
← 2017 · OEC Kaohsiung · 2019 →

Evgeny Donskoy was the defending champion but chose not to defend his title.

Gaël Monfils won the title after defeating Kwon Soon-woo 6–4, 2–6, 6–1 in the final.

	Semifinals							Final
	1/WC	Gaël Monfils	6	6
		Lee Duck-hee	1	1
								1/WC	Gaël Monfils	6	2	6
								Q	Kwon Soon-woo	4	6	1
	Q	Kwon Soon-woo	6	6
	2	Malek Jaziri	3	4

	First round							Second round							Quarterfinals							Semifinals
	1/WC	G Monfils	5	6	6
	Q	A Santillan	7	3	4			1/WC	G Monfils	6	6
		G Soeda	77	77					G Soeda	2	3
	LL	Y Sugita	64	64											1/WC	G Monfils	77	6
		Y Uchiyama	7	6											7/WC	E Gulbis	64	2
	SE	B Kavčič	5	2					Y Uchiyama	2	4
		A Bublik	1r					7/WC	E Gulbis	6	6
	7/WC	E Gulbis	3																			1/WC	G Monfils	6	6
	4	J Jung	6	6																			D-h Lee	1	1
	Q	Y-s Chung	3	4				4	J Jung	65	4
		T Brkić	2	65					D-h Lee	77	6
		D-h Lee	6	77												D-h Lee	6	7
		Y Nishioka	3	0											Q	F Ferreira Silva	2	5
	Q	F Ferreira Silva	6	6				Q	F Ferreira Silva	3	6	77
		M Neuchrist	4	2				6	R Ramanathan	6	4	64
	6	R Ramanathan	6	6

	First round							Second round							Quarterfinals							Semifinals
	5	L Harris	65	6	6
		J Ward	77	3	2			5	L Harris	3	5
	WC	T-l Wu	3	2				Q	S-w Kwon	6	7
	Q	S-w Kwon	6	6											Q	S-w Kwon	6	6
		H Moriya	4	3												B Schnur	3	4
		T-h Yang	6	6					T-h Yang	5	3
		B Schnur	6	77					B Schnur	7	6
	3	J Kubler	4	64																		Q	S-w Kwon	6	6
	8	P Gunneswaran	3	7	3																	2	M Jaziri	3	4
		J Rodionov	6	5	6				J Rodionov	6	1	6
		M Purcell	77	5	3			WC	C-h Tseng	4	6	3
	WC	C-h Tseng	64	7	6											J Rodionov	4	78	4
		F Peliwo	3	0											2	M Jaziri	6	66	6
		F Gaio	6	6					F Gaio	3	64
	SE	Z Li	2	2				2	M Jaziri	6	77
	2	M Jaziri	6	6

• Main Draw
• Qualifying Draw