Men's singles
2021 Dubai Tennis Championships
Final
Champion	Aslan Karatsev
Runner-up	Lloyd Harris
Score	6–3, 6–2
Details
Draw	48 (6 Q / 4 WC )
Seeds	16
Events
Singles men women Doubles men women
← 2020 · Dubai Tennis Championships · 2022 →

Aslan Karatsev won his first ATP Tour singles title, defeating Lloyd Harris in the final, 6–3, 6–2 to win the men's singles tennis title at the 2021 Dubai Tennis Championships. Karatsev became the second wildcard in the tournament's history to win the men's singles title. Harris was the first qualifier to reach the final of the Dubai Tennis Championships.

Novak Djokovic was the defending champion, but chose not to participate.^[1]

All seeds receive a bye into the second round.

The players who also received a bye into the second round were as follows, each semifinalist from Doha or Marseille:

• Nikoloz Basilashvili
• Matthew Ebden

The other six byes were removed, and six players were added to the main draw.

	Quarterfinals							Semifinals							Final
	Q	Lloyd Harris	6	3	6
		Kei Nishikori	1	6	3
								Q	Lloyd Harris	65	6	78
								3	Denis Shapovalov	77	4	66
	3	Denis Shapovalov	7	6
		Jérémy Chardy	5	4
															Q	Lloyd Harris	3	2
															WC	Aslan Karatsev	6	6
	WC	Aslan Karatsev	65	6	6
	16	Jannik Sinner	77	3	2
								WC	Aslan Karatsev	6	4	6
								2	Andrey Rublev	2	6	4
		Márton Fucsovics	5	2
	2	Andrey Rublev	7	6

	First round							Second round							Third round							Quarterfinals
								1	D Thiem	3	4
	Q	C O'Connell	77	4	1			Q	L Harris	6	6
	Q	L Harris	65	6	6										Q	L Harris	77	6
		A Davidovich Fokina	6	6											14	F Krajinović	65	4
	LL	R Albot	4	4					A Davidovich Fokina	5	4
								14	F Krajinović	7	6
																						Q	L Harris	6	3	6
																							K Nishikori	1	6	3
								LL	L Giustino	4	3
	Q	Y Bhambri	6	1	4				A Bedene	6	6
		A Bedene	3	6	6											A Bedene	4	4
		K Nishikori	3	6	6											K Nishikori	6	6
		R Opelka	6	3	4				K Nishikori	6	77
								5	D Goffin	3	63

	First round							Second round							Third round							Quarterfinals
								3	D Shapovalov	6	6
		J-L Struff	6	6					J-L Struff	1	3
	Q	M Kukushkin	3	2											3	D Shapovalov	6	6
		R Gasquet	6	6											13	H Hurkacz	4	3
		M Cecchinato	4	2					R Gasquet	3	4
								13	H Hurkacz	6	6
																						3	D Shapovalov	7	6
																							J Chardy	5	4
								9	A de Minaur	6	3	4
		J Chardy	6	3	6				J Chardy	2	6	6
		A Ramos Viñolas	3	6	4											J Chardy	63	6	6
	WC	A Popyrin	77	7											8	K Khachanov	77	4	4
	WC	D Novak	63	5				WC	A Popyrin	4	6	64
								8	K Khachanov	6	3	77

	First round							Second round							Third round							Quarterfinals
								17	L Sonego	6	6
	Q	B Zapata Miralles	6	6				Q	B Zapata Miralles	2	2
		J Millman	4	4											17	L Sonego	6	3	4
	WC	A Karatsev	6	6											WC	A Karatsev	3	6	6
		E Gerasimov	4	4				WC	A Karatsev	6	4	6
								12	D Evans	4	6	4
																						WC	A Karatsev	65	6	6
																						16	J Sinner	77	3	2
								16	J Sinner	2	77	6
		Y Nishioka	4	64					A Bublik	6	62	4
		A Bublik	6	77											16	J Sinner	6	3	7
															4	R Bautista Agut	4	6	5
								SE	M Ebden	1r
								4	R Bautista Agut	4

	First round							Second round							Third round							Quarterfinals
								6	P Carreño Busta	77	3	2
		V Pospisil	6	5	4				M Fucsovics	65	6	6
		M Fucsovics	2	7	6											M Fucsovics	6	4	6
	WC	M Jaziri	3												11	D Lajović	1	6	4
		J-W Tsonga	3r					WC	M Jaziri	5	2
								11	D Lajović	7	6
																							M Fucsovics	5	2
																						2	A Rublev	7	6
								15	T Fritz	4	6	77
									N Basilashvili	6	3	64
															15	T Fritz	3	1
	Q	E Ruusuvuori	6	77											2	A Rublev	6	6
		J Thompson	3	65				Q	E Ruusuvuori	4	4
								2	A Rublev	6	6

	First round							Qualifying competition
	1	Radu Albot	3	6	6
		Lukáš Lacko	6	4	4
								1	Radu Albot	6	5	4
								9	Bernabé Zapata Miralles	2	7	6
	WC	Omar Alawadhi	0	0
	9	Bernabé Zapata Miralles	6	6

	First round							Qualifying competition
	2	Lloyd Harris	6	6
		Teymuraz Gabashvili	1	2
								2	Lloyd Harris	6	6
								11	Blaž Rola	2	4
		Dmitry Popko	3	6	612
	11	Blaž Rola	6	4	714

	First round							Qualifying competition
	3	Emil Ruusuvuori	77	4	6
	WC	Dimitar Kuzmanov	64	6	1
								3	Emil Ruusuvuori	6	6
									Viktor Troicki	2	2
		Viktor Troicki	7	6
	8	Marc Polmans	5	0

	First round							Qualifying competition
	4	Mikhail Kukushkin	7	3	6
		Maxime Janvier	5	6	1
								4	Mikhail Kukushkin	6	6
								10	Lorenzo Giustino	2	2
	Alt	Andrea Vavassori	3	3
	10	Lorenzo Giustino	6	6

	First round							Qualifying competition
	5	Christopher O'Connell	6	6
		Cem İlkel	3	4
								5	Christopher O'Connell	6	6
								12	Thomas Fabbiano	2	4
	WC	Abdulrahman Al Janahi	1	2
	12	Thomas Fabbiano	6	6

	First round							Qualifying competition
	6	Evgeny Donskoy	4	4
		Ramkumar Ramanathan	6	6
									Ramkumar Ramanathan	5	7	2
								PR	Yuki Bhambri	7	5	6
	PR	Yuki Bhambri	6	6
	7	Prajnesh Gunneswaran	1	4

• Main draw
• Qualifying draw