Singles
2021 Sparkassen ATP Challenger
Champion	Oscar Otte
Runner-up	Maxime Cressy
Score	7–6(7–5), 6–4

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

Oscar Otte won the title after defeating Maxime Cressy 7–6^(7–5), 6–4 in the final.

Seeds

Draw

Finals

	Semifinals							Final
	1	Oscar Otte	77	6
		Jack Draper	63	4
								1	Oscar Otte	77	6
								2	Maxime Cressy	65	4
		Mirza Bašić	5	2
	2	Maxime Cressy	7	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	O Otte	77	77
		R Marcora	61	64				1	O Otte	6	6
		M Bachinger	6	69	78				M Bachinger	3	1
	Q	Tobias Simon	3	711	66										1	O Otte	6	6
		R Peniston	6	6												R Peniston	2	4
	Q	A Cozbinov	3	2					R Peniston	77	6
		GM Moroni	4	61				7	M-A Hüsler	61	4
	7	M-A Hüsler	6	77																		1	O Otte	77	6
	4	E Gómez	4	2																			J Draper	63	4
		J Draper	6	6					J Draper	6	77
	WC	M Arnaldi	69	0				Q	L Miedler	4	61
	Q	L Miedler	711	6												J Draper	66	77	6
		D Stricker	6	3	7										5	F Gaio	78	65	2
		M Viola	4	6	5				D Stricker	65	62
		N Kuhn	3	65				5	F Gaio	77	77
	5	F Gaio	6	77

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	F Verdasco	66	6	3
		V Sachko	78	4	6				V Sachko	6	6
		B Gojo	6	77					B Gojo	2	4
		D Masur	4	64												V Sachko	63	6	2
		M Bašić	6	6												M Bašić	77	3	6
		E Karlovskiy	4	3					M Bašić	714	6
	WC	L Nardi	4	3				3	Q Halys	612	3
	3	Q Halys	6	6																			M Bašić	5	2
	8	A Giannessi	78	3	5																	2	M Cressy	7	6
	Q	N Fatić	66	6	7			Q	N Fatić	61	2
		M Copil	6	77					M Copil	77	6
	WC	Alexander Weis	4	65												M Copil	68	4
		C-h Tseng	6	3	4										2	M Cressy	710	6
		R Quiroz	4	6	6				R Quiroz	63	4
		T van Rijthoven	66	5				2	M Cressy	77	6
	2	M Cressy	78	7

References

External links

• Main draw
• Qualifying draw