Singles
2018 Koblenz Open
Champion	Mats Moraing
Runner-up	Kenny de Schepper
Score	6–2, 6–1

Ruben Bemelmans was the defending champion but withdrew as he qualified for the 2018 Australian Open.

Mats Moraing won the title after defeating Kenny de Schepper 6–2, 6–1 in the final.

Seeds

Draw

Finals

	Semifinals							Final
	Alt	Ilya Ivashka	6	5	4
	6	Kenny de Schepper	3	7	6
								6	Kenny de Schepper	2	1
								WC	Mats Moraing	6	6
	3/Alt	Sergiy Stakhovsky	4	3
	WC	Mats Moraing	6	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	A Kuznetsov	4	6	3
	Alt	I Ivashka	6	4	6			Alt	I Ivashka	6	6
		K-M Maamoun	3	3				Q	C Heyman	4	4
	Q	Christopher Heyman	6	6											Alt	I Ivashka	6	6
		E Leshem	3	7	3										5	Y Maden	1	2
		D Popko	6	5	6				D Popko	5	4
		A Pavlásek	2	2				5	Y Maden	7	6
	5	Y Maden	6	6																		Alt	I Ivashka	6	5	4
	4	O Otte	66	3																		6	K de Schepper	3	7	6
		A Vatutin	78	6					A Vatutin	3	6	77
		H Hurkacz	6	6					H Hurkacz	6	0	65
		A Balázs	4	2												A Vatutin	6	67	1
		E Gulbis	4	6	1										6	K de Schepper	3	79	6
	WC	B Hassan	6	3	6			WC	B Hassan	77	1	4
		T Gabashvili	77	1	2			6	K de Schepper	64	6	6
	6	K de Schepper	65	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8/Alt	T Robredo	1	7	66
	WC	J Choinski	6	5	78			WC	J Choinski	3	6	4
		M Safwat	3	7	6				M Safwat	6	3	6
	Q	F Horanský	6	5	3											M Safwat	2	1
		N Kuhn	6	6											3/Alt	S Stakhovsky	6	6
	Q	M Ymer	3	3					N Kuhn	4	3
	Q	J De Loore	2	3				3/Alt	S Stakhovsky	6	6
	3/Alt	S Stakhovsky	6	6																		3/Alt	S Stakhovsky	4	3
	7	A Martin	2	4																		WC	M Moraing	6	6
		Z Kolář	6	6					Z Kolář	2	1
		Y Uchiyama	6	6					Y Uchiyama	6	6
	WC	M Möller	3	1												Y Uchiyama	4	62
		T Brkić	77	5	2										WC	M Moraing	6	77
	WC	M Moraing	62	7	6			WC	M Moraing	6	6
		A Arnaboldi	77	4	2			2	M Cecchinato	4	4
	2	M Cecchinato	62	6	6

References

• Main Draw
• Qualifying Draw