Doubles
2018 Koblenz Open
Final
Champions	Romain Arneodo Tristan-Samuel Weissborn
Runners-up	Sander Arends Antonio Šančić
Score	6–7(4–7), 7–5, [10–6]
Events
Singles Doubles
← 2017 · Koblenz Open · 2019 →

Hans Podlipnik-Castillo and Andrei Vasilevski were the defending champions but chose not to defend their title.

Romain Arneodo and Tristan-Samuel Weissborn won the title after defeating Sander Arends and Antonio Šančić 6–7^(4–7), 7–5, [10–6] in the final.

	First round							Quarterfinals							Semifinals							Final
	1	S Arends A Šančić	6	6
		T Matsui A Motti	4	4				1	S Arends A Šančić	77	2	[10]
		L Margaroli Y Uchiyama	4	3					Z Kolář A Pavlásek	62	6	[5]
		Z Kolář A Pavlásek	6	6											1	S Arends A Šančić	6	3	[11]
	4	S Balaji V Vardhan	4	67												G Panfil V Uzhylovskyi	4	6	[9]
	WC	J Choinski M Möller	6	79				WC	J Choinski M Möller	6	1	[4]
		T Bednarek D Pel	612	4					G Panfil V Uzhylovskyi	4	6	[10]
		G Panfil V Uzhylovskyi	714	6																		1	S Arends A Šančić	77	5	[6]
		I Sabanov M Sabanov	4	6	[13]																	2	R Arneodo T-S Weissborn	64	7	[10]
		K Krawietz R Roelofse	6	3	[11]				I Sabanov M Sabanov	79	4	[6]
	WC	Raphael Loukas N Serdarušić	2	2				3	S Gillé J Vliegen	67	6	[10]
	3	S Gillé J Vliegen	6	6											3	S Gillé J Vliegen	6	3	[4]
		M Moraing O Otte	2	6	[15]										2	R Arneodo T-S Weissborn	3	6	[10]
	WC	B Hassan N Kuhn	6	4	[13]				M Moraing O Otte
		M Draganja T Draganja	4	6	[3]			2	R Arneodo T-S Weissborn	w/o
	2	R Arneodo T-S Weissborn	6	1	[10]

• Main Draw