2021 Qatar ExxonMobil Open – Singles

Singles
2021 Qatar ExxonMobil Open
Champion	Nikoloz Basilashvili
Runner-up	Roberto Bautista Agut
Score	7–6(7–5), 6–2
Draw	28 (4 Q / 3 WC )
Seeds	8

Nikoloz Basilashvili defeated Roberto Bautista Agut in the final, 7–6^(7–5), 6–2 to win the men's singles tennis title at the 2021 Qatar Open. Basilashvili saved a match point against Roger Federer in the quarterfinals.

Andrey Rublev was the defending champion, but lost in the semifinals to Bautista Agut.^[1] Rublev's run to the semifinals was notable for his not hitting a single ball, having received a bye in the first round and walkovers in both the second round and quarterfinals.

This tournament marked the return of former world No. 1 Federer to the tour for the first time since the 2020 Australian Open, due to a pair of knee surgeries since then.^[2] His defeat to Basilashvili marked a record-extending 24th and final loss from match point up in his career.

The top four seeds received a bye into the second round.

	Semifinals							Final
	5	Roberto Bautista Agut	6	6
	3	Andrey Rublev	3	3
								5	Roberto Bautista Agut	65	2
									Nikoloz Basilashvili	77	6
		Taylor Fritz	63	1
		Nikoloz Basilashvili	77	6

	First round							Second round							Quarterfinals							Semifinals
								1	D Thiem	65	6	6
	WC	MS Zayid	4	0				WC	A Karatsev	77	3	2
	WC	A Karatsev	6	6											1	D Thiem	63	6	4
	Q	R Ramanathan	4	2											5	R Bautista Agut	77	2	6
		A Bublik	6	6					A Bublik	4	3
		R Opelka	6	3	4			5	R Bautista Agut	6	6
	5	R Bautista Agut	4	6	6																	5	R Bautista Agut	6	6
																						3	A Rublev	3	3
								3	A Rublev	w/o
		R Gasquet	6	6					R Gasquet
	Q	B Rola	4	4											3	A Rublev	w/o
		D Lajović	63	3												M Fucsovics
		M Fucsovics	77	6					M Fucsovics	4	77	6
	Q	L Harris	77	66	7			Q	L Harris	6	65	2
	7	S Wawrinka	63	78	5

	First round							Second round							Quarterfinals							Semifinals
	6	D Goffin	6	6
		F Krajinović	4	4				6	D Goffin	1	7	69
		L Sonego	65	4					T Fritz	6	5	711
		T Fritz	77	6												T Fritz	5	6	7
	Q	C O'Connell	3	4											4	D Shapovalov	7	3	5
		V Pospisil	6	6					V Pospisil	5	4
								4	D Shapovalov	7	6
																							T Fritz	63	1
	LL	N Gombos	2	5																			N Basilashvili	77	6
	WC	M Jaziri	6	7				WC	M Jaziri	2	2
		N Basilashvili	2	6	6				N Basilashvili	6	6
		J Millman	6	4	2											N Basilashvili	3	6	7
		J Chardy	4	6	2										2	R Federer	6	1	5
		D Evans	6	1	6				D Evans	68	6	5
								2	R Federer	710	3	7

	First round							Qualifying competition
								1	Lloyd Harris	6	6
								6	Lukáš Lacko	4	3
	WC	Mousa Shanan Zayed	1	1
	6	Lukáš Lacko	6	6

	First round							Qualifying competition
								2	Norbert Gombos	3	1
								7	Ramkumar Ramanathan	6	6
	Alt	Frederik Nielsen	4	1
	7	Ramkumar Ramanathan	6	6

	First round							Qualifying competition
								3	Christopher O'Connell	6	79
								5	Thomas Fabbiano	3	67

	First round							Qualifying competition
								4	Blaž Rola	77	6
								Alt	Tim Pütz	65	2
	Alt	Tim Pütz	6	6
	8/Alt	Marcelo Melo	3	2

• Main draw
• Qualifying draw