2021 MercedesCup – Singles

Singles
2021 MercedesCup
Champion	Marin Čilić
Runner-up	Félix Auger-Aliassime
Final score	7–6(7–2), 6–3
Details
Draw	28
Seeds	8
Events
Singles Doubles
← 2019 · Stuttgart Open ·  →

Matteo Berrettini was the defending champion^[1] from when the event was last held in 2019, but could not participate since he was still competing in the 2021 French Open at the beginning of the tournament.

Marin Čilić won the title, defeating Félix Auger-Aliassime in the final, 7–6^(7–2), 6–3. This was 8th consecutive final loss on ATP Tour for Auger-Aliassime.

Seeds[]

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

Draw[]

Key[]

Finals[]

	Semifinals							Final
		Marin Čilić	6	1
	WC	Jurij Rodionov	3	0r
									Marin Čilić	77	6
								3	Félix Auger-Aliassime	62	3
	3	Félix Auger-Aliassime	6	7
		Sam Querrey	4	5

Top half[]

	First Round							Second Round							Quarterfinals							Semifinals
								1	D Shapovalov	6	62	6
		F López	6	6					F López	2	77	3
		A Popyrin	4	4											1	D Shapovalov	5	63
		M Čilić	7	6												M Čilić	7	77
	WC	R Molleker	5	3					M Čilić	6	6
	WC	D Brown	3	64				5	N Basilashvili	3	2
	5	N Basilashvili	6	77																			M Čilić	6	1
																						WC	J Rodionov	3	0r
								4	A de Minaur	68	6	6
		G Pella	3	4					J Thompson	710	3	4
		J Thompson	6	6											4	A de Minaur	6	3	64
		D Koepfer	6	3	2										WC	J Rodionov	3	6	77
	WC	J Rodionov	2	6	6			WC	J Rodionov	5
	Q	P Gojowczyk	5	6	6			Q	P Gojowczyk	3r
	LL	I Ivashka	7	4	2

Bottom half[]

	First Round							Second Round							Quarterfinals							Semifinals
	6	U Humbert	6	6
		M Fucsovics	3	1				6	U Humbert	711	6
		J Chardy	4	4				WC	Y Hanfmann	69	2
	WC	Y Hanfmann	6	6											6	U Humbert	65	68
		G Simon	4	5											3	F Auger-Aliassime	77	710
		L Harris	6	7					L Harris	3	64
								3	F Auger-Aliassime	6	77
																						3	F Auger-Aliassime	6	7
	7	A Mannarino	3	2																			S Querrey	4	5
	Q	J Duckworth	6	6				Q	J Duckworth	4	67
	Q	A Çelikbilek	4	1					S Querrey	6	79
		S Querrey	6	6												S Querrey	64	77	6
	Q	R Albot	64	65											WC	DS Stricker	77	64	3
	WC	DS Stricker	77	77				WC	DS Stricker	77	77
								2	H Hurkacz	65	65

Qualifying[]

Seeds[]

Qualifiers[]

Lucky loser[]

Draw[]

First qualifier[]

	First Round							Qualifying Competition
	Alt	Luke Saville	78	4	4
	Alt	James Duckworth	66	6	6
								Alt	James Duckworth	77	3	7
								8	Ilya Ivashka	65	6	5
	WC	Daniel Masur	0	64
	8	Ilya Ivashka	6	77

Second qualifier[]

	First Round							Qualifying Competition
	Alt	Sergiy Stakhovsky	1	64
	Alt	Peter Gojowczyk	6	77
								Alt	Peter Gojowczyk	6	6
								Alt	Grégoire Barrère	2	4
	Alt	Grégoire Barrère	6	6
	5	Marcos Giron	3	2

Third qualifier[]

	First Round							Qualifying Competition
	3	Jiří Veselý	77	2	4
	Alt	Dennis Novak	65	6	6
								Alt	Dennis Novak	6	63	5
								Alt	Altuğ Çelikbilek	1	77	7
	Alt	Altuğ Çelikbilek	6	2	6
	6	Lucas Pouille	3	6	3

Fourth qualifier[]

	First Round							Qualifying Competition
	4	Emil Ruusuvuori	7	6
	Alt	João Sousa	5	3
								4	Emil Ruusuvuori	65	4
								7	Radu Albot	77	6
	Alt	Christopher O'Connell	3	0r
	7	Radu Albot	6	0

References[]

• Main Draw
• Qualifying Draw