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Singles
2018 Challenger Banque Nationale de Saguenay
Final
Champion	Katherine Sebov
Runner-up	Quirine Lemoine
Score	7–6(12–10), 7–6(7–4)
Events
Singles Doubles
← 2017 · Challenger de Saguenay · 2019 →

Gréta Arn was the defending champion, but chose not to participate.

Katherine Sebov won the title, defeating Quirine Lemoine in the final, 7–6^(12–10), 7–6^(7–4).^[1]

	Semifinals							Final
		Katherine Sebov	6	1	6
	Q	Daria Lopatetska	2	6	2
									Katherine Sebov	712	77
									Quirine Lemoine	610	64
	7	Bianca Andreescu	64	0r
		Quirine Lemoine	77	2

	First round							Second round							Quarterfinals							Semifinals
	1	K Kozlova	6	4
		S Reix	4	0r				1	K Kozlova	6	6
		J Cako	63	6	5			WC	A Vagramov	2	0
	WC	A Vagramov	77	1	7										1	K Kozlova	1	1
	Q	K Shaffer	6	6												K Sebov	6	6
		A Sadiković	2	1				Q	K Shaffer	2	2
		K Sebov	0	6	6				K Sebov	6	6
	8	K Zimmermann	6	1	4																		K Sebov	6	1	6
	4	N Broady	3	2																		Q	D Lopatetska	2	6	2
	Q	D Lopatetska	6	6				Q	D Lopatetska	6	5	6
		M Arcangioli	1	5					M Arcangioli	0	7	2
		M Osaka	6	2r											Q	D Lopatetska	7	6
		UM Arconada	6	4	1										6	J Ponchet	5	4
		R Anderson	4	6	6				R Anderson	2	6	3
		T Moore	1	1				6	J Ponchet	6	3	6
	6	J Ponchet	6	6

	First round							Second round							Quarterfinals							Semifinals
	7	B Andreescu	6	6
	WC	P Januskova	1	0				7	B Andreescu	7	7
	Q	H Carter	6	3	6			Q	H Carter	5	5
	Q	J Ho	1	6	4										7	B Andreescu	4	6	6
	WC	C Branstine	2	66											3	R Hogenkamp	6	3	1
		F Jones	6	78					F Jones	2	5
		M Chwalińska	6	65	3			3	R Hogenkamp	6	7
	3	R Hogenkamp	4	77	6																	7	B Andreescu	64	0r
	5	E Kostova	4	3																			Q Lemoine	77	2
	WC	J Bui	6	6				WC	J Bui	1	1
		Q Lemoine	6	6					Q Lemoine	6	6
		A Cadanțu	1	1												Q Lemoine	6	7
		M Sanchez	6	6											2	C Perrin	4	5
		M Mateas	2	4					M Sanchez	6	5	2
		M Manasse	1	2				2	C Perrin	4	7	6
	2	C Perrin	6	6

• Main Draw