Men's singles
2021 National Bank Open
Final
Champion	Daniil Medvedev
Runner-up	Reilly Opelka
Score	6–4, 6–3
Details
Draw	48 (6 Q / 3 WC )
Seeds	16
Events
Singles men women Doubles men women
← 2019 · National Bank Open · 2022 →

Daniil Medvedev defeated Reilly Opelka in the final, 6–4, 6–3 to win the men's singles tennis title at the 2021 Canadian Open. It was his fourth ATP Masters 1000 title and 12th career title. Opelka was contesting his maiden Masters 1000 final.^[1]

Rafael Nadal was the two-time reigning champion from when the event was last held in 2019 and was vying to tie Ivan Lendl's record of six Canadian Open titles,^[2] but did not participate due to a foot injury.^[3]

All seeds received a bye into the second round.

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

	Quarterfinals							Semifinals							Final
	1	Daniil Medvedev	2	78	77
	7	Hubert Hurkacz	6	66	65
								1	Daniil Medvedev	6	6
									John Isner	2	2
		John Isner	77	6
	11	Gaël Monfils	65	4
															1	Daniil Medvedev	6	6
																Reilly Opelka	4	3
	6	Casper Ruud	1	4
	3	Stefanos Tsitsipas	6	6
								3	Stefanos Tsitsipas	77	64	4
									Reilly Opelka	62	77	6
	10	Roberto Bautista Agut	3	61
		Reilly Opelka	6	77

	First round							Second round							Third round							Quarterfinals
								1	D Medvedev	4	6	6
		D Evans	4	4					A Bublik	6	3	4
		A Bublik	6	6											1	D Medvedev	6	6
	Q	J Duckworth	77	6											Q	J Duckworth	2	4
		T Fritz	62	3				Q	J Duckworth	6	6
								16	J Sinner	3	4
																						1	D Medvedev	2	78	77
																						7	H Hurkacz	6	66	65
								12	A de Minaur	1	1
	WC	J Brooksby	6	0	4				N Basilashvili	6	6
		N Basilashvili	2	6	6											N Basilashvili	79	4	4
		M Kecmanović	4	77	2										7	H Hurkacz	67	6	6
	PR	K Nishikori	6	65	6			PR	K Nishikori
								7	H Hurkacz	w/o

	First round							Second round							Third round							Quarterfinals
								4	A Rublev	77	6
		J-L Struff	77	2	4				F Fognini	64	3
		F Fognini	62	6	6										4	A Rublev	5	65
		J Isner	6	6												J Isner	7	77
		A Davidovich Fokina	4	1					J Isner	4	6	6
								13	C Garín	6	3	4
																							J Isner	77	6
																						11	G Monfils	65	4
								11	G Monfils	3	6	6
		J Millman	6	77					J Millman	6	3	4
	Q	R Berankis	3	64											11	G Monfils	6	77
	Q	Y Nishioka	4	3											LL	F Tiafoe	1	62
	LL	F Tiafoe	6	6				LL	F Tiafoe	6	6
								5	D Shapovalov	1	4

	First round							Second round							Third round							Quarterfinals
								6	C Ruud	6	3	6
		A Ramos Viñolas	2	6	3				M Čilić	3	6	3
		M Čilić	6	4	6										6	C Ruud	6	6
		D Lajović	3	6	6											D Lajović	4	3
	Q	E Ruusuvuori	6	3	3				D Lajović	7	6
								9	F Auger-Aliassime	5	4
																						6	C Ruud	1	4
																						3	S Tsitsipas	6	6
								15	A Karatsev	67	4
		C Norrie	4	7	4				K Khachanov	79	6
		K Khachanov	6	5	6											K Khachanov	3	2
		L Sonego	3	4											3	S Tsitsipas	6	6
		U Humbert	6	6					U Humbert	3	715	1
								3	S Tsitsipas	6	613	6

	First round							Second round							Third round							Quarterfinals
								8	D Schwartzman	7	6
		B Paire	6	6					B Paire	5	1
	SE	M McDonald	3	4											8	D Schwartzman	3	6	5
	WC	V Pospisil	77	2	3										10	R Bautista Agut	6	3	7
	Q	T Paul	65	6	6			Q	T Paul	3	4
								10	R Bautista Agut	6	6
																						10	R Bautista Agut	3	61
																							R Opelka	6	77
								14	G Dimitrov	3	4
	WC	N Kyrgios	6	64	4				R Opelka	6	6
		R Opelka	4	77	6											R Opelka	4	78	77
		L Harris	6	6												L Harris	6	66	64
	Q	B Schnur	3	2					L Harris	6	6
								LL	F López	2	3

	First round							Qualifying competition
	1	Frances Tiafoe	6	0	6
		J. J. Wolf	2	6	4
								1	Frances Tiafoe	1	4
								7	Emil Ruusuvuori	6	6
	WC	Steven Diez	3	2
	7	Emil Ruusuvuori	6	6

	First round							Qualifying competition
	2	Tommy Paul	77	6
	WC	Liam Draxl	60	4
								2	Tommy Paul	77	6
									Liam Broady	63	3
		Liam Broady	5	79	77
	8	Alexei Popyrin	7	67	62

	First round							Qualifying competition
	3	Yoshihito Nishioka	77	6
		Michael Mmoh	65	2
								3	Yoshihito Nishioka	7	78
								11	Feliciano López	5	66
		Maxime Cressy	64	4
	11	Feliciano López	77	6

	First round							Qualifying competition
	4	Dominik Koepfer	3	4
	WC	Peter Polansky	6	6
								WC	Peter Polansky	6	1	2
								9	James Duckworth	4	6	6
		Illya Marchenko	1	3
	9	James Duckworth	6	6

	First round							Qualifying competition
	Alt	Max Purcell	62	77	64
		Emilio Gómez	77	62	77
									Emilio Gómez	4	5
								10	Ričardas Berankis	6	7
		Norbert Gombos	65	4
	10	Ričardas Berankis	77	6

	First round							Qualifying competition
	6	Marcos Giron	2	3
	WC	Brayden Schnur	6	6
								WC	Brayden Schnur	79	6
									Daniel Elahi Galán	67	3
		Daniel Elahi Galán	6	2	6
	12	Benjamin Bonzi	3	6	2

• Main draw
• Qualifying draw