2021 Dutch Open – Singles

Singles
2021 Dutch Open
Champion	Tallon Griekspoor
Runner-up	Botic van de Zandschulp
Score	6–1, 3–6, 6–1

Mats Moraing was the defending champion^[1] but lost in the second round to Botic van de Zandschulp.

Tallon Griekspoor won the title after defeating van de Zandschulp 6–1, 3–6, 6–1 in the final.

	Semifinals							Final
	1	Tallon Griekspoor	4	6	6
	4	Antoine Hoang	6	3	4
								1	Tallon Griekspoor	6	3	6
								2	Botic van de Zandschulp	1	6	1
	7	Guido Andreozzi	77	3	2
	2	Botic van de Zandschulp	64	6	6

	First round							Second round							Quarterfinals							Semifinals
	1	T Griekspoor	6	77
	Q	M Geerts	2	62				1	T Griekspoor	6	6
		Z Bergs	4	62					M Vrbenský	4	4
		M Vrbenský	6	77											1	T Griekspoor	3	6	6
	WC	G Brouwer	79	0											6	K Coppejans	6	3	2
	Q	Alexander Maarten Jong	67	0r				WC	G Brouwer	3	4
	Q	Deney Wassermann	3	7	2			6	K Coppejans	6	6
	6	K Coppejans	6	5	6																	1	T Griekspoor	4	6	6
	4	A Hoang	6	77																		4	A Hoang	6	3	4
		Y Maden	4	65				4	A Hoang	77	77
	Alt	T Bellucci	3	4					F Mena	64	65
		F Mena	6	6											4	A Hoang	6	77
	WC	Ryan Nijboer	65	2											8	L Rosol	4	64
	Q	J Nikles	77	6				Q	J Nikles	2	1
		V Kopřiva	64	2				8	L Rosol	6	6
	8	L Rosol	77	6

	First round							Second round							Quarterfinals							Semifinals
	7	G Andreozzi	7	2	6
		J Lehečka	5	6	4			7	G Andreozzi	7	2	6
		R Haase	4	61					A Vukic	5	6	3
		A Vukic	6	77											7	G Andreozzi	3	6	6
		JC Aragone	1	1											WC	J Sels	6	4	2
	WC	J Sels	6	6				WC	J Sels	6	6
		A Vatutin	64	6	6				A Vatutin	2	2
	3	M Polmans	77	4	4																	7	G Andreozzi	77	3	2
	5	M Safwat	6	6																		2	B van de Zandschulp	64	6	6
		G Elias	1	3				5	M Safwat	6	1	4
		M Guinard	65	6	65				J de Jong	2	6	6
		J de Jong	77	4	77											J de Jong	3	0
		M Moraing	6	6											2	B van de Zandschulp	6	6
	Alt	J Härteis	1	0					M Moraing	3	5
		G Oliveira	2	4				2	B van de Zandschulp	6	7
	2	B van de Zandschulp	6	6

• Main draw
• Qualifying draw