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Singles
2021 Citi Open
Final
Champion	Jannik Sinner
Runner-up	Mackenzie McDonald
Score	7–5, 4–6, 7–5
Details
Draw	48 (6Q / 4WC)
Seeds	16
Events
Singles Doubles
← 2019 · Washington Open · 2022 →

Jannik Sinner defeated Mackenzie McDonald in the final, 7–5, 4–6, 7–5 to win the singles tennis title at the 2021 Citi Open. With the victory, Sinner became the youngest player and first teenager on the ATP Tour to win an ATP 500 title since the category was created in 2009.

Nick Kyrgios was the reigning champion from when the tournament was last held in 2019, but lost in the first round to McDonald.

Seeds

All seeds receive a bye into the second round.

01.   Rafael Nadal (third round)

02.   Félix Auger-Aliassime (third round)

03.   Alex de Minaur (second round)

04.   Grigor Dimitrov (second round)

05.   Jannik Sinner (champion)

06.   Dan Evans (second round)

07.   Cameron Norrie (third round)

08.   Reilly Opelka (third round)

09.   Alexander Bublik (second round)

10.   Taylor Fritz (second round)

11.   John Millman (quarterfinals)

12.   Sebastian Korda (third round)

13.   Benoît Paire (second round)

14.   Lloyd Harris (quarterfinals)

15.   Miomir Kecmanović (second round)

16.   Frances Tiafoe (second round)

Click on the seed number of a player to go to their draw section.

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• SE = Special exempt
• PR = Protected ranking
• ITF = ITF entry
• JE = Junior exempt
• w/o = Walkover
• r = Retired
• d = Defaulted
• SR = Special ranking

Finals

	Quarterfinals							Semifinals							Final
	14	Lloyd Harris	3	5
		Kei Nishikori	6	7
									Kei Nishikori	4	6	5
									Mackenzie McDonald	6	3	7
		Mackenzie McDonald	6	6
		Denis Kudla	3	2
																Mackenzie McDonald	5	6	5
															5	Jannik Sinner	7	4	7
	5	Jannik Sinner	6	6
		Steve Johnson	4	2
								5	Jannik Sinner	7	6
								WC	Jenson Brooksby	6	1
	11	John Millman	1	2
	WC	Jenson Brooksby	6	6

Top half

Section 1

	First round							Second round							Third round							Quarterfinals
								1/WC	R Nadal	6	4	7
	WC	J Sock	6	4				WC	J Sock	2	6	6
		Y Nishioka	7	0											1/WC	R Nadal	4	6	4
		T Sandgren	6	2	6										14	L Harris	6	1	6
		J Duckworth	3	6	2				T Sandgren	4	0
								14	L Harris	6	1
																						14	L Harris	3	5
																							K Nishikori	6	7
								9	A Bublik	2	5
		K Nishikori	6	6					K Nishikori	6	7
		S Querrey	4	3												K Nishikori	3	6	6
		M Giron	4	6	7										7	C Norrie	6	3	3
	Q	I Marchenko	6	4	6				M Giron	4	3
								7	C Norrie	6	6

Section 2

	First round							Second round							Third round							Quarterfinals
								4	G Dimitrov	2	6
		E Gerasimov	5	4					I Ivashka	6	7
		I Ivashka	7	6												I Ivashka	4	4
		M McDonald	6	6												M McDonald	6	6
		N Kyrgios	4	4					M McDonald	6	6	6
								13	B Paire	7	4	4
																							M McDonald	6	6
																							D Kudla	3	2
								10	T Fritz	4	2
		D Kudla	6	6	6				D Kudla	6	6
	WC	F López	3	7	3											D Kudla	3	7	6
	WC	B Nakashima	6	6											WC	B Nakashima	6	6	4
		A Popyrin	3	3				WC	B Nakashima	7	6
								6	D Evans	6	0

Bottom half

Section 3

	First round							Second round							Third round							Quarterfinals
								5	J Sinner	6	6
	Q	P Gunneswaran	6	1	1				E Ruusuvuori	2	4
		E Ruusuvuori	2	6	6										5	J Sinner	7	7
	Q	E Gómez	6	3	3										12	S Korda	6	6
		V Pospisil	4	6	6				V Pospisil	5	4
								12	S Korda	7	6
																						5	J Sinner	6	6
																							S Johnson	4	2
								15	M Kecmanović	3	2
	Q	M Krueger	6	2					R Berankis	6	6
		R Berankis	7	6												R Berankis	2	1
		S Johnson	6	7												S Johnson	6	6
	Q	R Ramanathan	3	6					S Johnson	6	6	6
								3	A de Minaur	7	4	2

Section 4

	First round							Second round							Third round							Quarterfinals
								8	R Opelka	7	6
		T Paul	4	3					DE Galán	6	3
		DE Galán	6	6											8	R Opelka	3	6
	Q	E Ymer	3	7	6										11	J Millman	6	7
		J Thompson	6	5	3			Q	E Ymer	2	6
								11	J Millman	6	7
																						11	J Millman	1	2
																						WC	J Brooksby	6	6
								16	F Tiafoe	6	5
		K Anderson	6	3				WC	J Brooksby	7	7
	WC	J Brooksby	7	6											WC	J Brooksby	6	6
		Y Uchiyama	6	5	3										2	F Auger-Aliassime	3	4
		A Seppi	3	7	6				A Seppi	6	2	2
								2	F Auger-Aliassime	2	6	6

Qualifying

Seeds

1. Yasutaka Uchiyama (moved to the main draw)
2. Liam Broady (qualifying competition)
3. J. J. Wolf (qualifying competition)
4. Maxime Cressy (qualifying competition)
5. Evgeny Donskoy (first round)
6. Prajnesh Gunneswaran (qualified)
7. Illya Marchenko (qualified)
8. Jason Jung (first round)
9. Sebastian Ofner (qualifying competition)
10. Emilio Gómez (qualified)
11. Elias Ymer (qualified)
12. Mitchell Krueger (qualified)

Qualifiers

1. Ramkumar Ramanathan
2. Emilio Gómez
3. Elias Ymer
4. Illya Marchenko
5. Mitchell Krueger
6. Prajnesh Gunneswaran

Qualifying draw

First qualifier

	First round							Qualifying competition
	Alt	Ramkumar Ramanathan	6	3	6
	Alt	Christopher Eubanks	4	6	3
								Alt	Ramkumar Ramanathan	7	6
								9	Sebastian Ofner	5	1
	PR	Tatsuma Ito	6	2
	9	Sebastian Ofner	7	6

Second qualifier

	First round							Qualifying competition
	2	Liam Broady	6	2	6
	Alt	Mikael Torpegaard	4	6	3
								2	Liam Broady	4	6
								10	Emilio Gómez	6	7
	Alt	Matthew Ebden	3	1
	10	Emilio Gómez	6	6

Third qualifier

	First round							Qualifying competition
	3/PR	J. J. Wolf	6	7	6
	WC	Ulises Blanch	7	6	3
								3/PR	J. J. Wolf	6	6
								11	Elias Ymer	7	7
		Bjorn Fratangelo	4	3
	11	Elias Ymer	6	6

Fourth qualifier

	First round							Qualifying competition
	4	Maxime Cressy	6	7
		Michael Mmoh	2	5
								4	Maxime Cressy	5	7	3
								7	Illya Marchenko	7	6	6
	WC	Ivo Karlović	3	7	3
	7	Illya Marchenko	6	6	6

Fifth qualifier

	First round							Qualifying competition
	5	Evgeny Donskoy	6	4
	Alt	Max Purcell	7	6
								Alt	Max Purcell	6	3	2
								12	Mitchell Krueger	3	6	6
	WC	Andrew Fenty	4	4
	12	Mitchell Krueger	6	6

Sixth qualifier

	First round							Qualifying competition
	6	Prajnesh Gunneswaran	6	6
	WC	Luke Saville	2	2
								6	Prajnesh Gunneswaran	6	6
									Go Soeda	3	1
		Go Soeda	6	6	6
	8	Jason Jung	4	7	4

References

1. "Kyrgios Can't Be Touched In D.C." ATP Tour. 4 August 2019.

External links

• Main draw
• Qualifying draw

• 2021 ATP Tour