Singles
2021 NÖ Open
Champion	Mats Moraing
Runner-up	Hugo Gaston
Score	6–2, 6–1

This was the first edition of the tournament.^[1]

Mats Moraing won the title after defeating Hugo Gaston 6–2, 6–1 in the final.

Seeds

Draw

Finals

	Semifinals							Final
	8	Hugo Gaston	6	3	6
	4	Kamil Majchrzak	3	6	4
								8	Hugo Gaston	2	1
									Mats Moraing	6	6
		Mats Moraing	3	7	6
	2	Jiří Veselý	6	5	3

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	M Cecchinato	61	6	2
	WC	F Misolic	77	2	6			WC	F Misolic	62	6	6
	Q	M Martineau	2	64					J Forejtek	77	3	2
		J Forejtek	6	77											WC	F Misolic	0	6	3
		S Ofner	6	5	77										8	H Gaston	6	2	6
	Q	B Hassan	3	7	65				S Ofner	1	4
	Q	N Oberleitner	65	2				8	H Gaston	6	6
	8	H Gaston	77	6																		8	H Gaston	6	3	6
	4	K Majchrzak	3	6	6																	4	K Majchrzak	3	6	4
		H Rune	6	4	2			4	K Majchrzak	6	6
		J Lehečka	6	6					J Lehečka	1	0
		M Janvier	4	3											4	K Majchrzak	77	7
	Alt	J Härteis	6	4	3											M-A Hüsler	65	5
		F Horanský	4	6	6				F Horanský	6	1	4
		M-A Hüsler	65	6	6				M-A Hüsler	2	6	6
	6	D Džumhur	77	2	3

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	5	J Kovalík	6	3	7
		Y Hanfmann	3	6	5			5	J Kovalík	6	3	4
		M Moraing	6	6					M Moraing	2	6	6
	Alt	L Miedler	2	1												M Moraing	6	0	77
		A Erler	4	7	1										3	T Monteiro	1	6	65
		L Rosol	6	5	6				L Rosol	66	1
		M Bachinger	6	1	1			3	T Monteiro	78	6
	3	T Monteiro	3	6	6																		M Moraing	3	7	6
	7	D Novak	1	6	6																	2	J Veselý	6	5	3
	Q	U Ignatik	6	4	2			7	D Novak	7	6
	WC	G Melzer	2	6	5				F Meligeni Alves	5	4
		F Meligeni Alves	6	3	7										7	D Novak	3	3
		C-M Stebe	3	0											2	J Veselý	6	6
		G Blancaneaux	6	6					G Blancaneaux	1	1
	WC	L Neumayer	5	68				2	J Veselý	6	6
	2	J Veselý	7	710

References

External links

• Main draw
• Qualifying draw