Men's singles
2019 Challenger Banque Nationale de Gatineau
Final
Champion	Jason Kubler
Runner-up	Enzo Couacaud
Score	6–4, 6–4
Events
Singles men women Doubles men women
← 2018 · Challenger de Gatineau · 2020 →

Bradley Klahn was the defending champion but chose not to defend his title.^[1]

Jason Kubler won the title after defeating Enzo Couacaud 6–4, 6–4 in the final.

All seeds receive a bye into the second round.

	Quarterfinals							Semifinals							Final
	16	Lee Duck-hee	2	3
	10	Jason Kubler	6	6
								10	Jason Kubler	6	6
									João Menezes	3	1
		João Menezes	4	7	7
	6	Norbert Gombos	6	5	5
															10	Jason Kubler	6	6
															15	Enzo Couacaud	4	4
	12	Darian King	6	1	6
	13	Maxime Janvier	3	6	1
								12	Darian King	2	4
								15	Enzo Couacaud	6	6
	11	Marc Polmans	1	4
	15	Enzo Couacaud	6	6

	First round							Second round							Third round							Quarterfinals
								1	A Hoang	3	6	64
	WC	A Galarneau	7	2	6			WC	A Galarneau	6	3	77
		MT Barrios Vera	5	6	3										WC	A Galarneau	3	5
		E Escobedo	6	6											16	D-h Lee	6	7
		A Sarkissian	1	3					E Escobedo	4	6	64
								16	D-h Lee	6	4	77
																						16	D-h Lee	2	3
																						10	J Kubler	6	6
								10	J Kubler	6	6
	ITF	E Hoyt	1	4					H Moriya	2	2
		H Moriya	6	6											10	J Kubler	6	7
		Mi Redlicki	6	4	7										5	D Sela	2	5
		D Petrović	3	6	5				Mi Redlicki	2	1
								5	D Sela	6	6

	First round							Second round							Third round							Quarterfinals
								3	P Polansky	5	6	6
		K Uchida	6	6					K Uchida	7	2	1
		Roy Smith	3	4											3	P Polansky	6	4	2
		J Menezes	6	6												J Menezes	4	6	6
	Q	D Novikov	4	2					J Menezes	4	6	6
									A Harris	6	3	4
																							J Menezes	4	7	7
																						6	N Gombos	6	5	5
								LL	B Klein	4	5
		Z Li	1	1				Alt	M Neuchrist	6	7
	Alt	M Neuchrist	6	6											Alt	M Neuchrist	65	3
		R Ortega Olmedo	1	4											6	N Gombos	77	6
	ITF	S Mansouri	6	6				ITF	S Mansouri	0	4
								6	N Gombos	6	6

	First round							Second round							Third round							Quarterfinals
								8	Y Uchiyama	6	6
		Yo Watanuki	66	6	6				Yo Watanuki	4	2
	Q	Jacob Grills	78	1	0										8	Y Uchiyama	6	2	3
	WC	L Draxl	6	6											12	D King	4	6	6
	ITF	Jordi Arconada	2	4				WC	L Draxl	6	5	2
								12	D King	3	7	6
																						12	D King	6	1	6
																						13	M Janvier	3	6	1
								13	M Janvier	4	77	6
		B Gojo	5	6	6				B Gojo	6	64	3
	WC	B Sigouin	7	3	2										13	M Janvier	7	5	6
		C Altamirano	1	61											4	M Mmoh	5	7	4
	WC	B Holt	6	77				WC	B Holt	4	2
								4	M Mmoh	6	6

	First round							Second round							Third round							Quarterfinals
								7	M Torpegaard	4	6	2
		M Banes	3	2					C İlkel	6	4	6
		C İlkel	6	6												C İlkel	3	6	1
		J. J. Wolf	6	6											11	M Polmans	6	1	6
		G Sakharov	4	2					J. J. Wolf	3	6	5
								11	M Polmans	6	4	7
																						11	M Polmans	1	4
																						15	E Couacaud	6	6
								15	E Couacaud	6	6
		A Santillan	6	3	1			PR	C Gómez-Herrera	2	3
	PR	C Gómez-Herrera	3	6	6										15	E Couacaud	7	7
	ITF	Shintaro Imai	6	2	7										2	S-w Kwon	5	5
	ITF	A Tabilo	4	6	5			ITF	S Imai	2	3
								2	S-w Kwon	6	6

• Main draw
• Qualifying draw