2021 Dutch Open – Singles

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

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

Main article: 2021 Dutch Open (tennis)

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

Seeds

1. Tallon Griekspoor (champion)
2. Botic van de Zandschulp (final)
3. Marc Polmans (first round)
4. Antoine Hoang (semifinals)
5. Mohamed Safwat (second round)
6. Kimmer Coppejans (quarterfinals)
7. Guido Andreozzi (semifinals)
8. Lukáš Rosol (quarterfinals)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• SE = Special exempt
• PR = Protected ranking
• ITF = ITF entry
• JE = Junior exempt
• w/o = Walkover
• r = Retired
• d = Defaulted
• SR = Special ranking

Finals

	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

Top half

	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

Bottom half

	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

External links

• Main draw
• Qualifying draw