2018 Banja Luka Challenger – Doubles

Marin and Tomislav Draganja were the defending champions, but only Tomislav chose to defend his title, partnering Alessandro Giannessi. Tomislav Draganja lost in the quarterfinals to Andrej Martin and Hans Podlipnik Castillo.

Martin and Podlipnik Castillo won the title after defeating Laurynas Grigelis and Alessandro Motti 7–5, 4–6, [10–7] in the final.

	First round							Quarterfinals							Semifinals							Final
	1	K Krawietz A Mies	77	6
		T Lipovšek Puches JI Londero	61	4				1	K Krawietz A Mies	0	0
	WC	Stefan Granolić Miloš Milaković	2	0					I Sabanov M Sabanov	6	6
		I Sabanov M Sabanov	6	6												I Sabanov M Sabanov	1	3
	3	J Ocleppo A Vavassori	4	3												A Martin H Podlipnik Castillo	6	6
		A Martin H Podlipnik Castillo	6	6					A Martin H Podlipnik Castillo	6	4	[10]
		P Cachin M Trungelliti	4	64					T Draganja A Giannessi	2	6	[8]
		T Draganja A Giannessi	6	77																			A Martin H Podlipnik Castillo	7	4	[10]
		C Berlocq D Marrero	6	6																			L Grigelis A Motti	5	6	[7]
	WC	Ivan Bjelica Darko Jandrić	3	4					C Berlocq D Marrero	6	79
		R Ojeda Lara O Roca Batalla	3	1				4	N Ćaćić T-S Weissborn	4	67
	4	N Ćaćić T-S Weissborn	6	6												C Berlocq D Marrero	65	65
	WC	Vanja Dobrnjac Ivan Randjelović	2	2												L Grigelis A Motti	77	77
		L Grigelis A Motti	6	6					L Grigelis A Motti	6	7
	Alt	D Kuzmanov JP Varillas	7	1	[10]			Alt	D Kuzmanov JP Varillas	0	5
	2	A Pavić A Šančić	5	6	[2]

• Main draw