2021 Atlanta Open – Singles

Alex de Minaur was the reigning champion from when the tournament was last held in 2019,^[1] but chose not to participate this year.

Singles
2021 Atlanta Open
Champion	John Isner
Runner-up	Brandon Nakashima
Score	7–6(10–8), 7–5
Draw	28 (4 Q / 3 WC )
Seeds	8

Main article: 2021 Atlanta Open

John Isner won his sixth Atlanta Open title, defeating Brandon Nakashima in the final, 7–6^(10–8), 7–5.

Seeds

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

1. Milos Raonic (second round)
2. Jannik Sinner (second round)
3. Cameron Norrie (quarterfinals)
4. Reilly Opelka (quarterfinals)
5. Taylor Fritz (semifinals)
6. John Isner (champion)
7. Benoît Paire (second round, retired)
8. Lloyd Harris (first round)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• ITF = ITF entry
• PR = Protected ranking
• SR = Special ranking
• SE = Special exempt
• JE = Junior exempt
• JR = Junior Accelerator Programme entrant
• CO = College Accelerator Programme entrant
• NG = Next Gen Accelerator Program entrant
• w/o = Walkover
• r = Retired
• d = Defaulted

Finals

	Semifinals							Final
	SE	Brandon Nakashima	3	6	6
		Emil Ruusuvuori	6	4	3
								SE	Brandon Nakashima	68	5
								6	John Isner	710	7
	5	Taylor Fritz	64	7	3
	6	John Isner	77	5	6

Top half

	First round							Second round							Quarterfinals							Semifinals
								1/WC	M Raonic	7	3	64
	WC	T Bryde	1	77	4			SE	B Nakashima	5	6	77
	SE	B Nakashima	6	65	6										SE	B Nakashima	77	7
	Q	P Gojowczyk	4	77	77											J Thompson	65	5
		S Querrey	6	63	65			Q	P Gojowczyk	66	4
		J Thompson	77	1	6				J Thompson	78	6
	8	L Harris	62	6	2																	SE	B Nakashima	3	6	6
																							E Ruusuvuori	6	4	3
								3	C Norrie	6	6
		K Anderson	64	3					N Kyrgios	1	4
		N Kyrgios	77	6											3	C Norrie	61	3
		M McDonald	63	5												E Ruusuvuori	77	6
		E Ruusuvuori	77	7					E Ruusuvuori	4	6	3
		Y Uchiyama	5	77	4			7	B Paire	6	4	0r
	7	B Paire	7	62	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	5	T Fritz	6	6
	Q	E Donskoy	3	4				5	T Fritz	65	6	6
		A Popyrin	64	3					S Johnson	77	4	1
		S Johnson	77	6											5	T Fritz	77	63	77
		A Seppi	5	65											4	R Opelka	65	77	64
	Q	B Fratangelo	7	77				Q	B Fratangelo	63	64
								4	R Opelka	77	77
																						5	T Fritz	64	7	3
	6	J Isner	6	63	6																	6	J Isner	77	5	6
	PR	J. J. Wolf	4	77	4			6	J Isner	78	6
	WC	J Sock	64	6	7			WC	J Sock	66	4
		R Berankis	77	4	5										6	J Isner	77	63	6
	Q	C O'Connell	4	6	6										Q	C O'Connell	65	77	4
		D Kudla	6	3	3			Q	C O'Connell	79	6
								2	J Sinner	67	4

Qualifying

Seeds

1. Peter Gojowczyk (qualified)
2. Christopher O'Connell (qualified)
3. Evgeny Donskoy (qualified)
4. Jason Jung (qualifying competition)
5. Illya Marchenko (first round)
6. Sebastian Ofner (qualifying competition, retired)
7. Elias Ymer (first round)
8. Go Soeda (first round)

Qualifiers

1. Peter Gojowczyk
2. Christopher O'Connell
3. Evgeny Donskoy
4. Bjorn Fratangelo

Qualifying draw

First qualifier

	First round							Qualifying competition
	1	Peter Gojowczyk	6	6
	WC	Donald Young	4	1
								1	Peter Gojowczyk	6	6
								Alt	James Ward	2	4
	Alt	James Ward	6	77
	5	Illya Marchenko	3	61

Second qualifier

	First round							Qualifying competition
	2	Christopher O'Connell	7	6
		Yosuke Watanuki	5	4
								2	Christopher O'Connell	4
								6	Sebastian Ofner	2r
	WC	Samir Banerjee	5	4
	6	Sebastian Ofner	7	6

Third qualifier

	First round							Qualifying competition
	3	Evgeny Donskoy	3	6	6
		Noah Rubin	6	3	4
								3	Evgeny Donskoy	6	6
									Matthew Ebden	4	4
		Matthew Ebden	6	77
	8	Go Soeda	3	64

Fourth qualifier

	First round							Qualifying competition
	4	Jason Jung	6	64	6
		Lukáš Lacko	4	77	3
								4	Jason Jung	3	6	5
									Bjorn Fratangelo	6	1	7
		Bjorn Fratangelo	77	6
	7	Elias Ymer	65	3