Singles
2018 Banja Luka Challenger
Final
Champion	Alessandro Giannessi
Runner-up	Carlos Berlocq
Score	6–7(6–8), 6–4, 6–4
Events
Singles Doubles
← 2017 · Banja Luka Challenger · 2019 →

Maximilian Marterer was the defending champion but chose not to defend his title.

Alessandro Giannessi won the title after defeating Carlos Berlocq 6–7^(6–8), 6–4, 6–4 in the final.

	Semifinals							Final
		Filippo Baldi	63	4
		Alessandro Giannessi	77	6
									Alessandro Giannessi	66	6	6
								7	Carlos Berlocq	78	4	4
		Johan Tatlot	2	4
	7	Carlos Berlocq	6	6

	First round							Second round							Quarterfinals							Semifinals
	1	JI Londero	5	6	5
	Q	A Karatsev	7	3	3r			1	JI Londero	6	6
	Q	F Coria	6	6				Q	F Coria	4	2
		K Krawietz	3	1											1	JI Londero	6	0	5
		F Baldi	6	6												F Baldi	4	6	7
		K Coppejans	1	4					F Baldi	w/o
	WC	Kento Tagashira	0	1				6	C Garín
	6	C Garín	6	6																			F Baldi	63	4
	3	M Trungelliti	3	3																			A Giannessi	77	6
		L Grigelis	6	6					L Grigelis	2	77	6
	SE	T Bellucci	77	6				SE	T Bellucci	6	65	3
		P Cachin	62	1												L Grigelis	3	4
		D Kuzmanov	6	77												A Giannessi	6	6
		A Pavić	1	60					D Kuzmanov	6	2	2
		A Giannessi	6	4	6				A Giannessi	2	6	6
	5	A Martin	4	6	4

	First round							Second round							Quarterfinals							Semifinals
	8	P Martínez	3	4
		J Tatlot	6	6					J Tatlot	6	6
	Q	A Lazov	6	6				Q	A Lazov	3	4
	WC	Franjo Raspudić	4	1												J Tatlot	4	7	7
		R Ojeda Lara	6	6											4	D Gimeno Traver	6	5	5
	WC	M Zekić	4	4					R Ojeda Lara	4	2
		F Horanský	1	62				4	D Gimeno Traver	6	6
	4	D Gimeno Traver	6	77																			J Tatlot	2	4
	7	C Berlocq	6	6																		7	C Berlocq	6	6
	WC	M Miladinović	2	1				7	C Berlocq	6	6
		O Roca Batalla	6	6					O Roca Batalla	4	4
		I Nedelko	0	4											7	C Berlocq	3	6	6
		B Zapata Miralles	6	6											2	P Andújar	6	4	1
		G Mager	4	1					B Zapata Miralles	4	5
	Q	A Vavassori	0	1				2	P Andújar	6	7
	2	P Andújar	6	6

• Main Draw
• Qualifying Draw