Singles
2020 Prosperita Open
Final
Champion	Aslan Karatsev
Runner-up	Oscar Otte
Score	6–4, 6–2
Events
Singles Doubles
← 2019 · Prosperita Open · 2021 →

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

Aslan Karatsev won the title after defeating Oscar Otte 6–4, 6–2 in the final.

	Semifinals							Final
		Botic van de Zandschulp	3	3
	SE	Aslan Karatsev	6	6
								SE	Aslan Karatsev	6	6
									Oscar Otte	4	2
		Oscar Otte	6	6
	SE	Tallon Griekspoor	2	4

	First round							Second round							Quarterfinals							Semifinals
	1	H Laaksonen	7	6
		B Schnur	5	1				1	H Laaksonen	3	2
	WC	O Virtanen	5	4					B van de Zandschulp	6	6
		B van de Zandschulp	7	6												B van de Zandschulp	5	6	6
		L Lacko	78	6												L Lacko	7	3	1
		F Horanský	66	2					L Lacko	6	7
		F Ferreira Silva	77	6					F Ferreira Silva	4	5
	5	M Kližan	64	2																			B van de Zandschulp	3	3
	4	E Gulbis	6	6																		SE	A Karatsev	6	6
	WC	D Svrčina	4	1				4	E Gulbis	1	4
	SE	A Karatsev	6	6				SE	A Karatsev	6	6
	WC	T Macháč	4	4											SE	A Karatsev	6	6
	Q	M Moraing	7	6											Q	M Moraing	3	3
		R Olivo	5	0				Q	M Moraing	6	64	4
		P Polansky	6	4	3			8	S Stakhovsky	1	77	0r
	8	S Stakhovsky	4	6	6

	First round							Second round							Quarterfinals							Semifinals
	LL	M Jaziri	3	5
	Q	Z Kolář	6	7				Q	Z Kolář	5	6	7
		R Safiullin	3	6	3				D Popko	7	4	5
		D Popko	6	1	6										Q	Z Kolář	1	1
		A Vukic	6	4	3											O Otte	6	6
		O Otte	3	6	6				O Otte	6	6
		L Rosol	2	6	6				L Rosol	2	0
	3	Hy Chung	6	4	0																		O Otte	6	6
	7	S Diez	6	6																		SE	T Griekspoor	2	4
		R Molleker	1	2				7	S Diez	6	2	4
	SE	T Griekspoor	4	6	77			SE	T Griekspoor	4	6	6
		R Haase	6	4	63										SE	T Griekspoor	77	6
	Q	M-A Hüsler	6	4	5										2	I Ivashka	63	3
		V Troicki	3	6	7				V Troicki	3	5
	Q	V Kopřiva	4	64				2	I Ivashka	6	7
	2	I Ivashka	6	77

• Main draw
• Qualifying draw