Singles
2021 Sparkassen Open
Champion	Daniel Altmaier
Runner-up	Henri Laaksonen
Score	6–1, 6–2

Thiago Monteiro was the defending champion^[1] but chose not to defend his title.

Daniel Altmaier won the title after defeating Henri Laaksonen 6–1, 6–2 in the final.

Seeds

Draw

Finals

	Semifinals							Final
		Vít Kopřiva	4	0
	5	Henri Laaksonen	6	6
								5	Henri Laaksonen	1	2
								8	Daniel Altmaier	6	6
	8	Daniel Altmaier	7	6
	WC	Marvin Möller	5	0

Top half

	First round							Second round							Quarterfinals							Semifinals
	1/WC	B Paire	6	2	7
		G Andreozzi	4	6	5			1/WC	B Paire	1	6	2
	Q	D Michalski	2	2					V Kopřiva	6	2	6
		V Kopřiva	6	6												V Kopřiva	3	6	7
		Z Bergs	6	6												Z Bergs	6	0	5
		M Marterer	2	1					Z Bergs	77	5	6
		K Coppejans	2	3				6	T Macháč	65	7	4
	6	T Macháč	6	6																			V Kopřiva	4	0
	4	J Kovalík	77	6																		5	H Laaksonen	6	6
		F Horanský	65	3				4	J Kovalík	6	7
		A Vukic	3	4				Alt	M Jaziri	1	5
	Alt	M Jaziri	6	6											4	J Kovalík	3	2
		N Kuhn	6	77											5	H Laaksonen	6	6
	Alt	M Zverev	2	64					N Kuhn	4	5
	Q	M Rosenkranz	3	2				5	H Laaksonen	6	7
	5	H Laaksonen	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	D Altmaier	6	7
		Z Kolář	2	5				8	D Altmaier	6	6
		M Vilella Martínez	3	6	6				M Vilella Martínez	3	2
	WC	R Molleker	6	4	3										8	D Altmaier	6	6
		E Ymer	6	7												E Ymer	3	3
		T Kamke	3	5					E Ymer	2	6	6
		S Diez	5	6	3			3	Y Hanfmann	6	3	2
	3	Y Hanfmann	7	2	6																	8	D Altmaier	7	6
	7	S Nagal	6	77																		WC	M Möller	5	0
		M Safwat	3	63				7	S Nagal	3	6	2
	WC	M Möller	7	6				WC	M Möller	6	1	6
		T Gabashvili	5	3											WC	M Möller	6	6
	Q	S Ehrat	65	6	6										LL	B Hassan	4	2
		M Moraing	77	4	4			Q	S Ehrat	6	3	4
	LL	B Hassan	6	79				LL	B Hassan	4	6	6
	Q	D Kelly	4	67

References

External links

• Main draw
• Qualifying draw