Roberto Bautista Agut defeated Tomáš Berdych in the final, 6–4, 3–6, 6–3 to win the singles tennis title at the 2019 ATP Qatar Open.

Gaël Monfils was the reigning champion, but did not participate this year.

	Semifinals							Final
	1	Novak Djokovic	6	66	4
	7	Roberto Bautista Agut	3	78	6
								7	Roberto Bautista Agut	6	3	6
								WC	Tomáš Berdych	4	6	3
	4	Marco Cecchinato	66	3
	WC	Tomáš Berdych	78	6

	First round							Second round							Quarterfinals							Semifinals
	1	N Djokovic	6	6
		D Džumhur	1	2				1	N Djokovic	4	6	6
		M Fucsovics	6	6					M Fucsovics	6	4	1
		M Copil	3	2											1	N Djokovic	4	6	6
		A Rublev	7	6											5	N Basilashvili	6	3	4
		A Seppi	5	1					A Rublev	3	4
		A Ramos Viñolas	1	6	1			5	N Basilashvili	6	6
	5	N Basilashvili	6	1	6																	1	N Djokovic	6	66	4
	3	K Khachanov	67	4																		7	R Bautista Agut	3	78	6
		S Wawrinka	79	6					S Wawrinka	6	77
		R Haase	79	4	64				N Jarry	4	63
		N Jarry	67	6	77											S Wawrinka	4	4
	WC	MS Zayid	1	3											7	R Bautista Agut	6	6
	Q	G García López	6	6				Q	G García López	1	4
		M Berrettini	1	4				7	R Bautista Agut	6	6
	7	R Bautista Agut	6	6

	First round							Second round							Quarterfinals							Semifinals
	6	D Goffin	6	4	64
	Q	R Berankis	3	6	77			Q	R Berankis	64	6	5
		D Lajović	6	77					D Lajović	77	0	7
		A Mannarino	3	65												D Lajović	62	2
		G Pella	77	6											4	M Cecchinato	77	6
	WC	C İlkel	61	3					G Pella
	Q	S Stakhovsky	4	2				4	M Cecchinato	w/o
	4	M Cecchinato	6	6																		4	M Cecchinato	66	3
	8	F Verdasco	6	6																		WC	T Berdych	78	6
	LL	P Lorenzi	3	4				8	F Verdasco	6	3	5
		P Kohlschreiber	4	65				WC	T Berdych	4	6	7
	WC	T Berdych	6	77											WC	T Berdych	6	6
	Q	M Marterer	6	6												P-H Herbert	2	4
		P Gojowczyk	1	4				Q	M Marterer	3	78	66
		P-H Herbert	6	7					P-H Herbert	6	66	78
	2	D Thiem	3	5

	First round							Qualifying competition
	1	Maximilian Marterer	3	6	6
		Andrea Arnaboldi	6	2	3
								1	Maximilian Marterer	4	6	7
								7	Marco Trungelliti	6	4	5
	WC	Mousa Shanan Zayed	0	1
	7	Marco Trungelliti	6	6

	First round							Qualifying competition
	2	Mirza Bašić	6	6
		Matthias Bachinger	3	3
								2	Mirza Bašić	6	2	3
									Sergiy Stakhovsky	3	6	6
		Sergiy Stakhovsky	77	7
	Alt	Gian Marco Moroni	65	5

	First round							Qualifying competition
	3	Guillermo García López	78	6
	Alt	James Ward	66	2
								3	Guillermo García López	4	6	6
								8	Marcos Baghdatis	6	2	4
		Lukáš Rosol	0	63
	8	Marcos Baghdatis	6	77

	First round							Qualifying competition
	4	Paolo Lorenzi	6	6
	WC	Jabor Al-Mutawa	1	0
								4	Paolo Lorenzi	4	64
								6	Ričardas Berankis	6	77
		Dennis Novak	4	3
	6	Ričardas Berankis	6	6

• Official website
• Singles draw
• Qualifying draw